ASoc Driver for Wolfson WM8742 DAC #292

escalator2015 · 2016-05-25T15:38:35Z

New driver for Wolfson WM8742 dac IC with Level adjustment correction and internal feature options exposed to Alsa control panel.

FadeMind · 2016-05-25T18:14:32Z

@escalator2015 FYI
https://www.kernel.org/doc/Documentation/SubmittingPatches
http://kernelnewbies.org/FirstKernelPatch
https://shkspr.mobi/blog/2014/04/submitting-trivial-linux-kernel-patches/

escalator2015 · 2016-05-26T06:50:43Z

Thanks for the links. I will check them and close my request

The following script makes kernel to crash since it can't obtain a name for a device, when the name is occupied by another device: #!/bin/bash ifconfig eth0 down ifconfig eth1 down index=`cat /sys/class/net/eth1/ifindex` ip link set eth1 name dev$index unshare -n sleep 1h & pid=$! while [[ "`readlink /proc/self/ns/net`" == "`readlink /proc/$pid/ns/net`" ]]; do continue; done ip link set dev$index netns $pid ip link set eth0 name dev$index kill -9 $pid Kernel messages: virtio_net virtio1 dev3: renamed from eth1 virtio_net virtio0 dev3: renamed from eth0 default_device_exit: failed to move dev3 to init_net: -17 ------------[ cut here ]------------ kernel BUG at net/core/dev.c:8978! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 276 Comm: kworker/u8:3 Not tainted 4.17.0+ torvalds#292 Workqueue: netns cleanup_net RIP: 0010:default_device_exit+0x9c/0xb0 [stack trace snipped] This patch gives more variability during choosing new name of device and fixes the problem. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>

This commits adds verifier tests covering per-cpu cgroup storage functionality. There are 6 new tests, which are exactly the same as for shared cgroup storage, but do use per-cpu cgroup storage map. Expected output: $ ./test_verifier #0/u add+sub+mul OK #0/p add+sub+mul OK ... torvalds#286/p invalid cgroup storage access 6 OK torvalds#287/p valid per-cpu cgroup storage access OK torvalds#288/p invalid per-cpu cgroup storage access 1 OK torvalds#289/p invalid per-cpu cgroup storage access 2 OK torvalds#290/p invalid per-cpu cgroup storage access 3 OK torvalds#291/p invalid per-cpu cgroup storage access 4 OK torvalds#292/p invalid per-cpu cgroup storage access 5 OK torvalds#293/p invalid per-cpu cgroup storage access 6 OK torvalds#294/p multiple registers share map_lookup_elem result OK ... torvalds#662/p mov64 src == dst OK torvalds#663/p mov64 src != dst OK Summary: 914 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org>

This commits adds verifier tests covering per-cpu cgroup storage functionality. There are 6 new tests, which are exactly the same as for shared cgroup storage, but do use per-cpu cgroup storage map. Expected output: $ ./test_verifier #0/u add+sub+mul OK #0/p add+sub+mul OK ... torvalds#286/p invalid cgroup storage access 6 OK torvalds#287/p valid per-cpu cgroup storage access OK torvalds#288/p invalid per-cpu cgroup storage access 1 OK torvalds#289/p invalid per-cpu cgroup storage access 2 OK torvalds#290/p invalid per-cpu cgroup storage access 3 OK torvalds#291/p invalid per-cpu cgroup storage access 4 OK torvalds#292/p invalid per-cpu cgroup storage access 5 OK torvalds#293/p invalid per-cpu cgroup storage access 6 OK torvalds#294/p multiple registers share map_lookup_elem result OK ... torvalds#662/p mov64 src == dst OK torvalds#663/p mov64 src != dst OK Summary: 914 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

This commits adds verifier tests covering per-cpu cgroup storage functionality. There are 6 new tests, which are exactly the same as for shared cgroup storage, but do use per-cpu cgroup storage map. Expected output: $ ./test_verifier #0/u add+sub+mul OK #0/p add+sub+mul OK ... torvalds#286/p invalid cgroup storage access 6 OK torvalds#287/p valid per-cpu cgroup storage access OK torvalds#288/p invalid per-cpu cgroup storage access 1 OK torvalds#289/p invalid per-cpu cgroup storage access 2 OK torvalds#290/p invalid per-cpu cgroup storage access 3 OK torvalds#291/p invalid per-cpu cgroup storage access 4 OK torvalds#292/p invalid per-cpu cgroup storage access 5 OK torvalds#293/p invalid per-cpu cgroup storage access 6 OK torvalds#294/p multiple registers share map_lookup_elem result OK ... torvalds#662/p mov64 src == dst OK torvalds#663/p mov64 src != dst OK Summary: 914 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org>

This commits adds verifier tests covering per-cpu cgroup storage functionality. There are 6 new tests, which are exactly the same as for shared cgroup storage, but do use per-cpu cgroup storage map. Expected output: $ ./test_verifier #0/u add+sub+mul OK #0/p add+sub+mul OK ... torvalds#286/p invalid cgroup storage access 6 OK torvalds#287/p valid per-cpu cgroup storage access OK torvalds#288/p invalid per-cpu cgroup storage access 1 OK torvalds#289/p invalid per-cpu cgroup storage access 2 OK torvalds#290/p invalid per-cpu cgroup storage access 3 OK torvalds#291/p invalid per-cpu cgroup storage access 4 OK torvalds#292/p invalid per-cpu cgroup storage access 5 OK torvalds#293/p invalid per-cpu cgroup storage access 6 OK torvalds#294/p multiple registers share map_lookup_elem result OK ... torvalds#662/p mov64 src == dst OK torvalds#663/p mov64 src != dst OK Summary: 914 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

Fix checkpatch errors: ERROR: else should follow close brace '}' torvalds#121: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c:121: + } + else WARNING: line over 80 characters torvalds#150: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c:150: + pinfo->tx_fifosize), (void __force *)pinfo->mem_addr, WARNING: Block comments should align the * on each line torvalds#66: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:66: + * Check, if transmit buffers are processed +*/ WARNING: braces {} are not necessary for any arm of this statement torvalds#170: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:170: + if (IS_SMC(pinfo)) { [...] + } else { [...] WARNING: labels should not be indented torvalds#292: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:292: + error_return: ERROR: code indent should use tabs where possible torvalds#299: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:299: +^I^I BD_SC_OV | BD_SC_ID);$ WARNING: labels should not be indented torvalds#319: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:319: + handle_error: WARNING: line over 80 characters torvalds#423: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:423: + setbits32(&pinfo->sccp->scc_gsmrl, (SCC_GSMRL_ENR | SCC_GSMRL_ENT)); ERROR: space required before the open parenthesis '(' torvalds#451: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:451: + while(!cpm_uart_tx_empty(port)) { WARNING: Missing a blank line after declarations torvalds#462: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:462: + smc_t __iomem *smcp = pinfo->smcp; + clrbits16(&smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN); WARNING: line over 80 characters torvalds#466: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:466: + clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); WARNING: Missing a blank line after declarations torvalds#466: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:466: + scc_t __iomem *sccp = pinfo->sccp; + clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); ERROR: code indent should use tabs where possible torvalds#484: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:484: + struct ktermios *termios,$ WARNING: please, no spaces at the start of a line torvalds#484: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:484: + struct ktermios *termios,$ ERROR: code indent should use tabs where possible torvalds#485: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:485: + struct ktermios *old)$ WARNING: please, no spaces at the start of a line torvalds#485: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:485: + struct ktermios *old)$ WARNING: line over 80 characters torvalds#624: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:624: + /* Output in *one* operation, so we don't interrupt RX/TX if they WARNING: Block comments use a trailing */ on a separate line torvalds#625: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:625: + * were already enabled. */ WARNING: line over 80 characters torvalds#629: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:629: + out_be16(&pinfo->sccup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); WARNING: line over 80 characters torvalds#773: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:773: + mem_addr = pinfo->mem_addr + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize); ERROR: code indent should use tabs where possible torvalds#797: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:797: +^I (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#799: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:799: +^I (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#836: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:836: +^I SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);$ ERROR: code indent should use tabs where possible torvalds#859: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:859: +^I (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#861: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:861: +^I (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);$ WARNING: space prohibited between function name and open parenthesis '(' torvalds#866: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:866: +#if defined (CONFIG_I2C_SPI_SMC1_UCODE_PATCH) WARNING: line over 80 characters torvalds#921: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:921: + clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); WARNING: Missing a blank line after declarations torvalds#462: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:462: + smc_t __iomem *smcp = pinfo->smcp; + clrbits16(&smcp->smc_smcmr, WARNING: Missing a blank line after declarations torvalds#467: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:467: + scc_t __iomem *sccp = pinfo->sccp; + clrbits32(&sccp->scc_gsmrl, ERROR: code indent should use tabs where possible #1151: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1151: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line #1151: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1151: + struct uart_cpm_port *pinfo)$ ERROR: "(foo*)" should be "(foo *)" #1161: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1161: + struct clk *clk = clk_get(NULL, (const char*)data); WARNING: Missing a blank line after declarations #1162: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1162: + struct clk *clk = clk_get(NULL, (const char*)data); + if (!IS_ERR(clk)) ERROR: code indent should use tabs where possible #1169: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1169: +^I^I^I "fsl,cpm-brg property.\n", np);$ ERROR: code indent should use tabs where possible #1178: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1178: +^I^I "fsl,cpm-command property.\n", np);$ ERROR: code indent should use tabs where possible #1192: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1192: WARNING: braces {} are not necessary for any arm of this statement #1279: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1279: + if (unlikely(nolock)) { [...] + } else { [...] WARNING: braces {} are not necessary for any arm of this statement #1287: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1287: + if (unlikely(nolock)) { [...] + } else { [...] WARNING: line over 80 characters #1354: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1354: + clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); ERROR: Macros with complex values should be enclosed in parentheses #1394: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1394: +#define CPM_UART_CONSOLE &cpm_scc_uart_console WARNING: Missing a blank line after declarations #1437: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1437: + struct uart_cpm_port *pinfo = platform_get_drvdata(ofdev); + return uart_remove_one_port(&cpm_reg, &pinfo->port); WARNING: please, no spaces at the start of a line #1464: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1464: + };$ WARNING: Missing a blank line after declarations #1469: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1469: + int ret = uart_register_driver(&cpm_reg); + if (ret) WARNING: Missing a blank line after declarations torvalds#1062: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1062: + int i; + volatile cbd_t *bdp; ERROR: "foo * bar" should be "foo *bar" torvalds#19: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h:19: +static inline void cpm_set_scc_fcr(scc_uart_t __iomem * sup) ERROR: "foo * bar" should be "foo *bar" torvalds#25: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h:25: +static inline void cpm_set_smc_fcr(smc_uart_t __iomem * up) WARNING: Improper SPDX comment style for 'drivers/tty/serial/cpm_uart/cpm_uart.h', please use '/*' instead #1: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:1: +// SPDX-License-Identifier: GPL-2.0 WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 #1: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:1: +// SPDX-License-Identifier: GPL-2.0 WARNING: Block comments use * on subsequent lines torvalds#106: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:106: +/* + virtual to phys transtalion ERROR: code indent should use tabs where possible torvalds#109: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:109: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line torvalds#109: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:109: + struct uart_cpm_port *pinfo)$ ERROR: code indent should use tabs where possible torvalds#125: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:125: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line torvalds#125: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:125: + struct uart_cpm_port *pinfo)$ Signed-off-by: Enrico Weigelt <info@metux.net>

…ing_events An Oops during the boot is found on some SNR machines. [ 15.795410] BUG: unable to handle page fault for address: 00000000000022b0 [ 15.795412] #PF: supervisor read access in kernel mode [ 15.795413] #PF: error_code(0x0000) - not-present page [ 15.795414] PGD 0 P4D 0 [ 15.795418] Oops: 0000 [#1] SMP NOPTI [ 15.795420] CPU: 6 PID: 941 Comm: systemd-udevd Not tainted 5.3.0-snr-v5.3 torvalds#292 [ 15.795421] Hardware name: Intel Corporation JACOBSVILLE/JACOBSVILLE, BIOS JBVLCRB1.86B.0011.D44.1909191126 09/19/2019 [ 15.795428] RIP: 0010:strlen+0x0/0x20 [ 15.795431] Code: 48 89 f9 74 09 48 83 c1 01 80 39 00 75 f7 31 d2 44 0f b6 04 16 44 88 04 11 48 83 c2 01 45 84 c0 75 ee c3 0f 1f 80 00 00 00 00 <80> 3f 00 74 10 48 89 f8 48 83 c0 01 80 38 00 75 f7 48 29 f8 c3 31 [ 15.855395] i801_smbus 0000:00:1f.4: SPD Write Disable is set [ 15.858351] RSP: 0018:ffffaeb4812039c8 EFLAGS: 00010202 [ 15.858353] RAX: 0000000000000000 RBX: ffff9fec99c71300 RCX: 0000000000008000 [ 15.858354] RDX: 00000000000022b0 RSI: 0000000000000cc0 RDI: 00000000000022b0 [ 15.858355] RBP: 00000000000022b0 R08: 0000000000000000 R09: 0000000000000000 [ 15.858356] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9fec8583a800 [ 15.858357] R13: 0000000000000cc0 R14: ffff9fec94015648 R15: ffff9fec81f291a8 [ 15.858358] FS: 00007f89e7160940(0000) GS:ffff9fec9dc00000(0000) knlGS:0000000000000000 [ 15.858361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.864343] i801_smbus 0000:00:1f.4: SMBus using polling [ 15.869998] CR2: 00000000000022b0 CR3: 0000000842ca2000 CR4: 0000000000340ee0 [ 15.870000] Call Trace: [ 15.870006] kstrdup+0x1a/0x60 [ 15.870012] __kernfs_new_node+0x41/0x1f0 [ 15.870018] ? __mutex_unlock_slowpath+0x4d/0x2a0 [ 15.895135] ioatdma 0000:00:01.3: enabling device (0004 -> 0006) [ 15.899395] kernfs_new_node+0x36/0x60 [ 15.899400] __kernfs_create_file+0x2c/0xf3 [ 15.961374] sysfs_add_file_mode_ns+0xa4/0x1a0 [ 15.961379] internal_create_group+0x117/0x370 [ 15.972133] ? sysfs_add_file_mode_ns+0xa4/0x1a0 [ 15.972138] internal_create_groups.part.0+0x3d/0xa0 [ 15.982656] device_add+0x625/0x690 [ 15.982662] pmu_dev_alloc+0x93/0xf0 [ 15.982664] perf_pmu_register+0x292/0x3e0 [ 15.982674] uncore_pmu_register+0x76/0x120 [intel_uncore] [ 15.982681] intel_uncore_init+0x1fd/0xe2c [intel_uncore] [ 15.982688] ? uncore_types_init+0x1d4/0x1d4 [intel_uncore] [ 16.013580] do_one_initcall+0x5d/0x2e4 [ 16.013584] ? do_init_module+0x23/0x230 [ 16.013586] ? rcu_read_lock_sched_held+0x6b/0x80 [ 16.013589] ? kmem_cache_alloc_trace+0x2c4/0x2f0 [ 16.013591] ? do_init_module+0x23/0x230 [ 16.013594] do_init_module+0x5c/0x230 [ 16.013597] load_module+0x2779/0x2a90 [ 16.013605] ? ima_post_read_file+0xfd/0x110 [ 16.026926] ioatdma 0000:00:01.4: enabling device (0004 -> 0006) [ 16.028808] ? __do_sys_finit_module+0xaa/0x110 [ 16.060527] __do_sys_finit_module+0xaa/0x110 [ 16.060536] do_syscall_64+0x5c/0xb0 [ 16.060540] entry_SYSCALL_64_after_hwframe+0x49/0xbe This snr_uncore_imc_freerunning_events array was missing an end-marker. Fixes: ee49532 ("perf/x86/intel/uncore: Add IMC uncore support for Snow Ridge") Reported-by: Like Xu <like.xu@linux.intel.com> Tested-by: Like Xu <like.xu@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Cc: stable@vger.kernel.org

Fix checkpatch errors: ERROR: else should follow close brace '}' torvalds#121: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c:121: + } + else WARNING: line over 80 characters torvalds#150: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c:150: + pinfo->tx_fifosize), (void __force *)pinfo->mem_addr, WARNING: Block comments should align the * on each line torvalds#66: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:66: + * Check, if transmit buffers are processed +*/ WARNING: braces {} are not necessary for any arm of this statement torvalds#170: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:170: + if (IS_SMC(pinfo)) { [...] + } else { [...] WARNING: labels should not be indented torvalds#292: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:292: + error_return: ERROR: code indent should use tabs where possible torvalds#299: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:299: +^I^I BD_SC_OV | BD_SC_ID);$ WARNING: labels should not be indented torvalds#319: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:319: + handle_error: WARNING: line over 80 characters torvalds#423: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:423: + setbits32(&pinfo->sccp->scc_gsmrl, (SCC_GSMRL_ENR | SCC_GSMRL_ENT)); ERROR: space required before the open parenthesis '(' torvalds#451: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:451: + while(!cpm_uart_tx_empty(port)) { WARNING: Missing a blank line after declarations torvalds#462: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:462: + smc_t __iomem *smcp = pinfo->smcp; + clrbits16(&smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN); WARNING: line over 80 characters torvalds#466: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:466: + clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); WARNING: Missing a blank line after declarations torvalds#466: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:466: + scc_t __iomem *sccp = pinfo->sccp; + clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); ERROR: code indent should use tabs where possible torvalds#484: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:484: + struct ktermios *termios,$ WARNING: please, no spaces at the start of a line torvalds#484: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:484: + struct ktermios *termios,$ ERROR: code indent should use tabs where possible torvalds#485: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:485: + struct ktermios *old)$ WARNING: please, no spaces at the start of a line torvalds#485: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:485: + struct ktermios *old)$ WARNING: line over 80 characters torvalds#624: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:624: + /* Output in *one* operation, so we don't interrupt RX/TX if they WARNING: Block comments use a trailing */ on a separate line torvalds#625: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:625: + * were already enabled. */ WARNING: line over 80 characters torvalds#629: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:629: + out_be16(&pinfo->sccup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); WARNING: line over 80 characters torvalds#773: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:773: + mem_addr = pinfo->mem_addr + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize); ERROR: code indent should use tabs where possible torvalds#797: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:797: +^I (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#799: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:799: +^I (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#836: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:836: +^I SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);$ ERROR: code indent should use tabs where possible torvalds#859: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:859: +^I (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#861: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:861: +^I (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);$ WARNING: space prohibited between function name and open parenthesis '(' torvalds#866: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:866: +#if defined (CONFIG_I2C_SPI_SMC1_UCODE_PATCH) WARNING: line over 80 characters torvalds#921: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:921: + clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); WARNING: Missing a blank line after declarations torvalds#462: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:462: + smc_t __iomem *smcp = pinfo->smcp; + clrbits16(&smcp->smc_smcmr, WARNING: Missing a blank line after declarations torvalds#467: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:467: + scc_t __iomem *sccp = pinfo->sccp; + clrbits32(&sccp->scc_gsmrl, ERROR: code indent should use tabs where possible #1151: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1151: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line #1151: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1151: + struct uart_cpm_port *pinfo)$ ERROR: "(foo*)" should be "(foo *)" #1161: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1161: + struct clk *clk = clk_get(NULL, (const char*)data); WARNING: Missing a blank line after declarations #1162: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1162: + struct clk *clk = clk_get(NULL, (const char*)data); + if (!IS_ERR(clk)) ERROR: code indent should use tabs where possible #1169: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1169: +^I^I^I "fsl,cpm-brg property.\n", np);$ ERROR: code indent should use tabs where possible #1178: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1178: +^I^I "fsl,cpm-command property.\n", np);$ ERROR: code indent should use tabs where possible #1192: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1192: WARNING: braces {} are not necessary for any arm of this statement #1279: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1279: + if (unlikely(nolock)) { [...] + } else { [...] WARNING: braces {} are not necessary for any arm of this statement #1287: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1287: + if (unlikely(nolock)) { [...] + } else { [...] WARNING: line over 80 characters #1354: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1354: + clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); ERROR: Macros with complex values should be enclosed in parentheses #1394: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1394: +#define CPM_UART_CONSOLE &cpm_scc_uart_console WARNING: Missing a blank line after declarations #1437: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1437: + struct uart_cpm_port *pinfo = platform_get_drvdata(ofdev); + return uart_remove_one_port(&cpm_reg, &pinfo->port); WARNING: please, no spaces at the start of a line #1464: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1464: + };$ WARNING: Missing a blank line after declarations #1469: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1469: + int ret = uart_register_driver(&cpm_reg); + if (ret) WARNING: Missing a blank line after declarations torvalds#1062: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1062: + int i; + volatile cbd_t *bdp; ERROR: "foo * bar" should be "foo *bar" torvalds#19: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h:19: +static inline void cpm_set_scc_fcr(scc_uart_t __iomem * sup) ERROR: "foo * bar" should be "foo *bar" torvalds#25: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h:25: +static inline void cpm_set_smc_fcr(smc_uart_t __iomem * up) WARNING: Improper SPDX comment style for 'drivers/tty/serial/cpm_uart/cpm_uart.h', please use '/*' instead #1: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:1: +// SPDX-License-Identifier: GPL-2.0 WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 #1: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:1: +// SPDX-License-Identifier: GPL-2.0 WARNING: Block comments use * on subsequent lines torvalds#106: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:106: +/* + virtual to phys transtalion ERROR: code indent should use tabs where possible torvalds#109: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:109: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line torvalds#109: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:109: + struct uart_cpm_port *pinfo)$ ERROR: code indent should use tabs where possible torvalds#125: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:125: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line torvalds#125: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:125: + struct uart_cpm_port *pinfo)$ Signed-off-by: Enrico Weigelt <info@metux.net>

…ing_events An Oops during the boot is found on some SNR machines. [ 15.795410] BUG: unable to handle page fault for address: 00000000000022b0 [ 15.795412] #PF: supervisor read access in kernel mode [ 15.795413] #PF: error_code(0x0000) - not-present page [ 15.795414] PGD 0 P4D 0 [ 15.795418] Oops: 0000 [#1] SMP NOPTI [ 15.795420] CPU: 6 PID: 941 Comm: systemd-udevd Not tainted 5.3.0-snr-v5.3 torvalds#292 [ 15.795421] Hardware name: Intel Corporation JACOBSVILLE/JACOBSVILLE, BIOS JBVLCRB1.86B.0011.D44.1909191126 09/19/2019 [ 15.795428] RIP: 0010:strlen+0x0/0x20 [ 15.795431] Code: 48 89 f9 74 09 48 83 c1 01 80 39 00 75 f7 31 d2 44 0f b6 04 16 44 88 04 11 48 83 c2 01 45 84 c0 75 ee c3 0f 1f 80 00 00 00 00 <80> 3f 00 74 10 48 89 f8 48 83 c0 01 80 38 00 75 f7 48 29 f8 c3 31 [ 15.855395] i801_smbus 0000:00:1f.4: SPD Write Disable is set [ 15.858351] RSP: 0018:ffffaeb4812039c8 EFLAGS: 00010202 [ 15.858353] RAX: 0000000000000000 RBX: ffff9fec99c71300 RCX: 0000000000008000 [ 15.858354] RDX: 00000000000022b0 RSI: 0000000000000cc0 RDI: 00000000000022b0 [ 15.858355] RBP: 00000000000022b0 R08: 0000000000000000 R09: 0000000000000000 [ 15.858356] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9fec8583a800 [ 15.858357] R13: 0000000000000cc0 R14: ffff9fec94015648 R15: ffff9fec81f291a8 [ 15.858358] FS: 00007f89e7160940(0000) GS:ffff9fec9dc00000(0000) knlGS:0000000000000000 [ 15.858361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.864343] i801_smbus 0000:00:1f.4: SMBus using polling [ 15.869998] CR2: 00000000000022b0 CR3: 0000000842ca2000 CR4: 0000000000340ee0 [ 15.870000] Call Trace: [ 15.870006] kstrdup+0x1a/0x60 [ 15.870012] __kernfs_new_node+0x41/0x1f0 [ 15.870018] ? __mutex_unlock_slowpath+0x4d/0x2a0 [ 15.895135] ioatdma 0000:00:01.3: enabling device (0004 -> 0006) [ 15.899395] kernfs_new_node+0x36/0x60 [ 15.899400] __kernfs_create_file+0x2c/0xf3 [ 15.961374] sysfs_add_file_mode_ns+0xa4/0x1a0 [ 15.961379] internal_create_group+0x117/0x370 [ 15.972133] ? sysfs_add_file_mode_ns+0xa4/0x1a0 [ 15.972138] internal_create_groups.part.0+0x3d/0xa0 [ 15.982656] device_add+0x625/0x690 [ 15.982662] pmu_dev_alloc+0x93/0xf0 [ 15.982664] perf_pmu_register+0x292/0x3e0 [ 15.982674] uncore_pmu_register+0x76/0x120 [intel_uncore] [ 15.982681] intel_uncore_init+0x1fd/0xe2c [intel_uncore] [ 15.982688] ? uncore_types_init+0x1d4/0x1d4 [intel_uncore] [ 16.013580] do_one_initcall+0x5d/0x2e4 [ 16.013584] ? do_init_module+0x23/0x230 [ 16.013586] ? rcu_read_lock_sched_held+0x6b/0x80 [ 16.013589] ? kmem_cache_alloc_trace+0x2c4/0x2f0 [ 16.013591] ? do_init_module+0x23/0x230 [ 16.013594] do_init_module+0x5c/0x230 [ 16.013597] load_module+0x2779/0x2a90 [ 16.013605] ? ima_post_read_file+0xfd/0x110 [ 16.026926] ioatdma 0000:00:01.4: enabling device (0004 -> 0006) [ 16.028808] ? __do_sys_finit_module+0xaa/0x110 [ 16.060527] __do_sys_finit_module+0xaa/0x110 [ 16.060536] do_syscall_64+0x5c/0xb0 [ 16.060540] entry_SYSCALL_64_after_hwframe+0x49/0xbe This snr_uncore_imc_freerunning_events array was missing an end-marker. Fixes: ee49532 ("perf/x86/intel/uncore: Add IMC uncore support for Snow Ridge") Reported-by: Like Xu <like.xu@linux.intel.com> Tested-by: Like Xu <like.xu@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Cc: stable@vger.kernel.org

Fix checkpatch errors: ERROR: else should follow close brace '}' torvalds#121: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c:121: + } + else WARNING: line over 80 characters torvalds#150: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c:150: + pinfo->tx_fifosize), (void __force *)pinfo->mem_addr, WARNING: Block comments should align the * on each line torvalds#66: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:66: + * Check, if transmit buffers are processed +*/ WARNING: braces {} are not necessary for any arm of this statement torvalds#170: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:170: + if (IS_SMC(pinfo)) { [...] + } else { [...] WARNING: labels should not be indented torvalds#292: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:292: + error_return: ERROR: code indent should use tabs where possible torvalds#299: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:299: +^I^I BD_SC_OV | BD_SC_ID);$ WARNING: labels should not be indented torvalds#319: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:319: + handle_error: WARNING: line over 80 characters torvalds#423: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:423: + setbits32(&pinfo->sccp->scc_gsmrl, (SCC_GSMRL_ENR | SCC_GSMRL_ENT)); ERROR: space required before the open parenthesis '(' torvalds#451: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:451: + while(!cpm_uart_tx_empty(port)) { WARNING: Missing a blank line after declarations torvalds#462: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:462: + smc_t __iomem *smcp = pinfo->smcp; + clrbits16(&smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN); WARNING: line over 80 characters torvalds#466: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:466: + clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); WARNING: Missing a blank line after declarations torvalds#466: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:466: + scc_t __iomem *sccp = pinfo->sccp; + clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); ERROR: code indent should use tabs where possible torvalds#484: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:484: + struct ktermios *termios,$ WARNING: please, no spaces at the start of a line torvalds#484: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:484: + struct ktermios *termios,$ ERROR: code indent should use tabs where possible torvalds#485: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:485: + struct ktermios *old)$ WARNING: please, no spaces at the start of a line torvalds#485: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:485: + struct ktermios *old)$ WARNING: line over 80 characters torvalds#624: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:624: + /* Output in *one* operation, so we don't interrupt RX/TX if they WARNING: Block comments use a trailing */ on a separate line torvalds#625: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:625: + * were already enabled. */ WARNING: line over 80 characters torvalds#629: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:629: + out_be16(&pinfo->sccup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); WARNING: line over 80 characters torvalds#773: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:773: + mem_addr = pinfo->mem_addr + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize); ERROR: code indent should use tabs where possible torvalds#797: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:797: +^I (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#799: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:799: +^I (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#836: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:836: +^I SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);$ ERROR: code indent should use tabs where possible torvalds#859: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:859: +^I (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);$ ERROR: code indent should use tabs where possible torvalds#861: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:861: +^I (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);$ WARNING: space prohibited between function name and open parenthesis '(' torvalds#866: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:866: +#if defined (CONFIG_I2C_SPI_SMC1_UCODE_PATCH) WARNING: line over 80 characters torvalds#921: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:921: + clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); WARNING: Missing a blank line after declarations torvalds#462: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:462: + smc_t __iomem *smcp = pinfo->smcp; + clrbits16(&smcp->smc_smcmr, WARNING: Missing a blank line after declarations torvalds#467: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:467: + scc_t __iomem *sccp = pinfo->sccp; + clrbits32(&sccp->scc_gsmrl, ERROR: code indent should use tabs where possible #1151: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1151: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line #1151: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1151: + struct uart_cpm_port *pinfo)$ ERROR: "(foo*)" should be "(foo *)" #1161: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1161: + struct clk *clk = clk_get(NULL, (const char*)data); WARNING: Missing a blank line after declarations #1162: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1162: + struct clk *clk = clk_get(NULL, (const char*)data); + if (!IS_ERR(clk)) ERROR: code indent should use tabs where possible #1169: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1169: +^I^I^I "fsl,cpm-brg property.\n", np);$ ERROR: code indent should use tabs where possible #1178: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1178: +^I^I "fsl,cpm-command property.\n", np);$ ERROR: code indent should use tabs where possible #1192: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1192: WARNING: braces {} are not necessary for any arm of this statement #1279: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1279: + if (unlikely(nolock)) { [...] + } else { [...] WARNING: braces {} are not necessary for any arm of this statement #1287: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1287: + if (unlikely(nolock)) { [...] + } else { [...] WARNING: line over 80 characters #1354: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1354: + clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); ERROR: Macros with complex values should be enclosed in parentheses #1394: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1394: +#define CPM_UART_CONSOLE &cpm_scc_uart_console WARNING: Missing a blank line after declarations #1437: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1437: + struct uart_cpm_port *pinfo = platform_get_drvdata(ofdev); + return uart_remove_one_port(&cpm_reg, &pinfo->port); WARNING: please, no spaces at the start of a line #1464: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1464: + };$ WARNING: Missing a blank line after declarations #1469: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1469: + int ret = uart_register_driver(&cpm_reg); + if (ret) WARNING: Missing a blank line after declarations torvalds#1062: FILE: drivers/tty/serial/cpm_uart/cpm_uart_core.c:1062: + int i; + volatile cbd_t *bdp; ERROR: "foo * bar" should be "foo *bar" torvalds#19: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h:19: +static inline void cpm_set_scc_fcr(scc_uart_t __iomem * sup) ERROR: "foo * bar" should be "foo *bar" torvalds#25: FILE: drivers/tty/serial/cpm_uart/cpm_uart_cpm1.h:25: +static inline void cpm_set_smc_fcr(smc_uart_t __iomem * up) WARNING: Improper SPDX comment style for 'drivers/tty/serial/cpm_uart/cpm_uart.h', please use '/*' instead #1: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:1: +// SPDX-License-Identifier: GPL-2.0 WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 #1: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:1: +// SPDX-License-Identifier: GPL-2.0 WARNING: Block comments use * on subsequent lines torvalds#106: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:106: +/* + virtual to phys transtalion ERROR: code indent should use tabs where possible torvalds#109: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:109: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line torvalds#109: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:109: + struct uart_cpm_port *pinfo)$ ERROR: code indent should use tabs where possible torvalds#125: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:125: + struct uart_cpm_port *pinfo)$ WARNING: please, no spaces at the start of a line torvalds#125: FILE: drivers/tty/serial/cpm_uart/cpm_uart.h:125: + struct uart_cpm_port *pinfo)$ Signed-off-by: Enrico Weigelt <info@metux.net>

…pper Improve safety with fallible version of `pointer::pin()`

…_lock Taking sb_writers whilst holding mmap_lock isn't allowed and will result in a lockdep warning like that below. The problem comes from cachefiles needing to take the sb_writers lock in order to do a write to the cache, but being asked to do this by netfslib called from readpage, readahead or write_begin[1]. Fix this by always offloading the write to the cache off to a worker thread. The main thread doesn't need to wait for it, so deadlock can be avoided. This can be tested by running the quick xfstests on something like afs or ceph with lockdep enabled. WARNING: possible circular locking dependency detected 5.15.0-rc1-build2+ torvalds#292 Not tainted ------------------------------------------------------ holetest/65517 is trying to acquire lock: ffff88810c81d730 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_fault+0x276/0x7a5 but task is already holding lock: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock#2){++++}-{3:3}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b __might_fault+0x87/0xb1 strncpy_from_user+0x25/0x18c removexattr+0x7c/0xe5 __do_sys_fremovexattr+0x73/0x96 do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #1 (sb_writers#10){.+.+}-{0:0}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b cachefiles_write+0x2b3/0x4bb netfs_rreq_do_write_to_cache+0x3b5/0x432 netfs_readpage+0x2de/0x39d filemap_read_page+0x51/0x94 filemap_get_pages+0x26f/0x413 filemap_read+0x182/0x427 new_sync_read+0xf0/0x161 vfs_read+0x118/0x16e ksys_read+0xb8/0x12e do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #0 (mapping.invalidate_lock#3){.+.+}-{3:3}: check_noncircular+0xe4/0x129 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b down_read+0x40/0x4a filemap_fault+0x276/0x7a5 __do_fault+0x96/0xbf do_fault+0x262/0x35a __handle_mm_fault+0x171/0x1b5 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c exc_page_fault+0x85/0xa5 asm_exc_page_fault+0x1e/0x30 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#3 --> sb_writers#10 --> &mm->mmap_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(sb_writers#10); lock(&mm->mmap_lock#2); lock(mapping.invalidate_lock#3); *** DEADLOCK *** 1 lock held by holetest/65517: #0: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c stack backtrace: CPU: 0 PID: 65517 Comm: holetest Not tainted 5.15.0-rc1-build2+ torvalds#292 Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014 Call Trace: dump_stack_lvl+0x45/0x59 check_noncircular+0xe4/0x129 ? print_circular_bug+0x207/0x207 ? validate_chain+0x461/0x4a8 ? add_chain_block+0x88/0xd9 ? hlist_add_head_rcu+0x49/0x53 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 ? check_prev_add+0x3a4/0x3a4 ? mark_lock+0xa5/0x1c6 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b ? filemap_fault+0x276/0x7a5 ? rcu_read_unlock+0x59/0x59 ? add_to_page_cache_lru+0x13c/0x13c ? lock_is_held_type+0x7b/0xd3 down_read+0x40/0x4a ? filemap_fault+0x276/0x7a5 filemap_fault+0x276/0x7a5 ? pagecache_get_page+0x2dd/0x2dd ? __lock_acquire+0x8bc/0x949 ? pte_offset_kernel.isra.0+0x6d/0xc3 __do_fault+0x96/0xbf ? do_fault+0x124/0x35a do_fault+0x262/0x35a ? handle_pte_fault+0x1c1/0x20d __handle_mm_fault+0x171/0x1b5 ? handle_pte_fault+0x20d/0x20d ? __lock_release+0x151/0x254 ? mark_held_locks+0x1f/0x78 ? rcu_read_unlock+0x3a/0x59 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c ? pgtable_bad+0x70/0x70 ? rcu_read_lock_bh_held+0xab/0xab exc_page_fault+0x85/0xa5 ? asm_exc_page_fault+0x8/0x30 asm_exc_page_fault+0x1e/0x30 RIP: 0033:0x40192f Code: ff 48 89 c3 48 8b 05 50 28 00 00 48 85 ed 7e 23 31 d2 4b 8d 0c 2f eb 0a 0f 1f 00 48 8b 05 39 28 00 00 48 0f af c2 48 83 c2 01 <48> 89 1c 01 48 39 d5 7f e8 8b 0d f2 27 00 00 31 c0 85 c9 74 0e 8b RSP: 002b:00007f9931867eb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007f9931868700 RCX: 00007f993206ac00 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007ffc13e06ee0 RBP: 0000000000000100 R08: 0000000000000000 R09: 00007f9931868700 R10: 00007f99318689d0 R11: 0000000000000202 R12: 00007ffc13e06ee0 R13: 0000000000000c00 R14: 00007ffc13e06e00 R15: 00007f993206a000 Fixes: 726218f ("netfs: Define an interface to talk to a cache") Signed-off-by: David Howells <dhowells@redhat.com> cc: Jan Kara <jack@suse.cz> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/ [1]

…_lock Taking sb_writers whilst holding mmap_lock isn't allowed and will result in a lockdep warning like that below. The problem comes from cachefiles needing to take the sb_writers lock in order to do a write to the cache, but being asked to do this by netfslib called from readpage, readahead or write_begin[1]. Fix this by always offloading the write to the cache off to a worker thread. The main thread doesn't need to wait for it, so deadlock can be avoided. This can be tested by running the quick xfstests on something like afs or ceph with lockdep enabled. WARNING: possible circular locking dependency detected 5.15.0-rc1-build2+ torvalds#292 Not tainted ------------------------------------------------------ holetest/65517 is trying to acquire lock: ffff88810c81d730 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_fault+0x276/0x7a5 but task is already holding lock: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock#2){++++}-{3:3}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b __might_fault+0x87/0xb1 strncpy_from_user+0x25/0x18c removexattr+0x7c/0xe5 __do_sys_fremovexattr+0x73/0x96 do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #1 (sb_writers#10){.+.+}-{0:0}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b cachefiles_write+0x2b3/0x4bb netfs_rreq_do_write_to_cache+0x3b5/0x432 netfs_readpage+0x2de/0x39d filemap_read_page+0x51/0x94 filemap_get_pages+0x26f/0x413 filemap_read+0x182/0x427 new_sync_read+0xf0/0x161 vfs_read+0x118/0x16e ksys_read+0xb8/0x12e do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #0 (mapping.invalidate_lock#3){.+.+}-{3:3}: check_noncircular+0xe4/0x129 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b down_read+0x40/0x4a filemap_fault+0x276/0x7a5 __do_fault+0x96/0xbf do_fault+0x262/0x35a __handle_mm_fault+0x171/0x1b5 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c exc_page_fault+0x85/0xa5 asm_exc_page_fault+0x1e/0x30 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#3 --> sb_writers#10 --> &mm->mmap_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(sb_writers#10); lock(&mm->mmap_lock#2); lock(mapping.invalidate_lock#3); *** DEADLOCK *** 1 lock held by holetest/65517: #0: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c stack backtrace: CPU: 0 PID: 65517 Comm: holetest Not tainted 5.15.0-rc1-build2+ torvalds#292 Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014 Call Trace: dump_stack_lvl+0x45/0x59 check_noncircular+0xe4/0x129 ? print_circular_bug+0x207/0x207 ? validate_chain+0x461/0x4a8 ? add_chain_block+0x88/0xd9 ? hlist_add_head_rcu+0x49/0x53 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 ? check_prev_add+0x3a4/0x3a4 ? mark_lock+0xa5/0x1c6 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b ? filemap_fault+0x276/0x7a5 ? rcu_read_unlock+0x59/0x59 ? add_to_page_cache_lru+0x13c/0x13c ? lock_is_held_type+0x7b/0xd3 down_read+0x40/0x4a ? filemap_fault+0x276/0x7a5 filemap_fault+0x276/0x7a5 ? pagecache_get_page+0x2dd/0x2dd ? __lock_acquire+0x8bc/0x949 ? pte_offset_kernel.isra.0+0x6d/0xc3 __do_fault+0x96/0xbf ? do_fault+0x124/0x35a do_fault+0x262/0x35a ? handle_pte_fault+0x1c1/0x20d __handle_mm_fault+0x171/0x1b5 ? handle_pte_fault+0x20d/0x20d ? __lock_release+0x151/0x254 ? mark_held_locks+0x1f/0x78 ? rcu_read_unlock+0x3a/0x59 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c ? pgtable_bad+0x70/0x70 ? rcu_read_lock_bh_held+0xab/0xab exc_page_fault+0x85/0xa5 ? asm_exc_page_fault+0x8/0x30 asm_exc_page_fault+0x1e/0x30 RIP: 0033:0x40192f Code: ff 48 89 c3 48 8b 05 50 28 00 00 48 85 ed 7e 23 31 d2 4b 8d 0c 2f eb 0a 0f 1f 00 48 8b 05 39 28 00 00 48 0f af c2 48 83 c2 01 <48> 89 1c 01 48 39 d5 7f e8 8b 0d f2 27 00 00 31 c0 85 c9 74 0e 8b RSP: 002b:00007f9931867eb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007f9931868700 RCX: 00007f993206ac00 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007ffc13e06ee0 RBP: 0000000000000100 R08: 0000000000000000 R09: 00007f9931868700 R10: 00007f99318689d0 R11: 0000000000000202 R12: 00007ffc13e06ee0 R13: 0000000000000c00 R14: 00007ffc13e06e00 R15: 00007f993206a000 Fixes: 726218f ("netfs: Define an interface to talk to a cache") Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Jeff Layton <jlayton@kernel.org> cc: Jan Kara <jack@suse.cz> cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/ [1] Link: https://lore.kernel.org/r/163887597541.1596626.2668163316598972956.stgit@warthog.procyon.org.uk/ # v1

…_lock [ Upstream commit 598ad0b ] Taking sb_writers whilst holding mmap_lock isn't allowed and will result in a lockdep warning like that below. The problem comes from cachefiles needing to take the sb_writers lock in order to do a write to the cache, but being asked to do this by netfslib called from readpage, readahead or write_begin[1]. Fix this by always offloading the write to the cache off to a worker thread. The main thread doesn't need to wait for it, so deadlock can be avoided. This can be tested by running the quick xfstests on something like afs or ceph with lockdep enabled. WARNING: possible circular locking dependency detected 5.15.0-rc1-build2+ torvalds#292 Not tainted ------------------------------------------------------ holetest/65517 is trying to acquire lock: ffff88810c81d730 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_fault+0x276/0x7a5 but task is already holding lock: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock#2){++++}-{3:3}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b __might_fault+0x87/0xb1 strncpy_from_user+0x25/0x18c removexattr+0x7c/0xe5 __do_sys_fremovexattr+0x73/0x96 do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #1 (sb_writers#10){.+.+}-{0:0}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b cachefiles_write+0x2b3/0x4bb netfs_rreq_do_write_to_cache+0x3b5/0x432 netfs_readpage+0x2de/0x39d filemap_read_page+0x51/0x94 filemap_get_pages+0x26f/0x413 filemap_read+0x182/0x427 new_sync_read+0xf0/0x161 vfs_read+0x118/0x16e ksys_read+0xb8/0x12e do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #0 (mapping.invalidate_lock#3){.+.+}-{3:3}: check_noncircular+0xe4/0x129 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b down_read+0x40/0x4a filemap_fault+0x276/0x7a5 __do_fault+0x96/0xbf do_fault+0x262/0x35a __handle_mm_fault+0x171/0x1b5 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c exc_page_fault+0x85/0xa5 asm_exc_page_fault+0x1e/0x30 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#3 --> sb_writers#10 --> &mm->mmap_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(sb_writers#10); lock(&mm->mmap_lock#2); lock(mapping.invalidate_lock#3); *** DEADLOCK *** 1 lock held by holetest/65517: #0: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c stack backtrace: CPU: 0 PID: 65517 Comm: holetest Not tainted 5.15.0-rc1-build2+ torvalds#292 Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014 Call Trace: dump_stack_lvl+0x45/0x59 check_noncircular+0xe4/0x129 ? print_circular_bug+0x207/0x207 ? validate_chain+0x461/0x4a8 ? add_chain_block+0x88/0xd9 ? hlist_add_head_rcu+0x49/0x53 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 ? check_prev_add+0x3a4/0x3a4 ? mark_lock+0xa5/0x1c6 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b ? filemap_fault+0x276/0x7a5 ? rcu_read_unlock+0x59/0x59 ? add_to_page_cache_lru+0x13c/0x13c ? lock_is_held_type+0x7b/0xd3 down_read+0x40/0x4a ? filemap_fault+0x276/0x7a5 filemap_fault+0x276/0x7a5 ? pagecache_get_page+0x2dd/0x2dd ? __lock_acquire+0x8bc/0x949 ? pte_offset_kernel.isra.0+0x6d/0xc3 __do_fault+0x96/0xbf ? do_fault+0x124/0x35a do_fault+0x262/0x35a ? handle_pte_fault+0x1c1/0x20d __handle_mm_fault+0x171/0x1b5 ? handle_pte_fault+0x20d/0x20d ? __lock_release+0x151/0x254 ? mark_held_locks+0x1f/0x78 ? rcu_read_unlock+0x3a/0x59 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c ? pgtable_bad+0x70/0x70 ? rcu_read_lock_bh_held+0xab/0xab exc_page_fault+0x85/0xa5 ? asm_exc_page_fault+0x8/0x30 asm_exc_page_fault+0x1e/0x30 RIP: 0033:0x40192f Code: ff 48 89 c3 48 8b 05 50 28 00 00 48 85 ed 7e 23 31 d2 4b 8d 0c 2f eb 0a 0f 1f 00 48 8b 05 39 28 00 00 48 0f af c2 48 83 c2 01 <48> 89 1c 01 48 39 d5 7f e8 8b 0d f2 27 00 00 31 c0 85 c9 74 0e 8b RSP: 002b:00007f9931867eb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007f9931868700 RCX: 00007f993206ac00 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007ffc13e06ee0 RBP: 0000000000000100 R08: 0000000000000000 R09: 00007f9931868700 R10: 00007f99318689d0 R11: 0000000000000202 R12: 00007ffc13e06ee0 R13: 0000000000000c00 R14: 00007ffc13e06e00 R15: 00007f993206a000 Fixes: 726218f ("netfs: Define an interface to talk to a cache") Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Jeff Layton <jlayton@kernel.org> cc: Jan Kara <jack@suse.cz> cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/ [1] Link: https://lore.kernel.org/r/163887597541.1596626.2668163316598972956.stgit@warthog.procyon.org.uk/ # v1 Signed-off-by: Sasha Levin <sashal@kernel.org>

WARNING: please, no spaces at the start of a line torvalds#249: FILE: mm/page-writeback.c:2089: + {$ ERROR: code indent should use tabs where possible torvalds#250: FILE: mm/page-writeback.c:2090: + .procname = "dirty_background_ratio",$ WARNING: please, no spaces at the start of a line torvalds#250: FILE: mm/page-writeback.c:2090: + .procname = "dirty_background_ratio",$ ERROR: code indent should use tabs where possible torvalds#251: FILE: mm/page-writeback.c:2091: + .data = &dirty_background_ratio,$ WARNING: please, no spaces at the start of a line torvalds#251: FILE: mm/page-writeback.c:2091: + .data = &dirty_background_ratio,$ ERROR: code indent should use tabs where possible torvalds#252: FILE: mm/page-writeback.c:2092: + .maxlen = sizeof(dirty_background_ratio),$ WARNING: please, no spaces at the start of a line torvalds#252: FILE: mm/page-writeback.c:2092: + .maxlen = sizeof(dirty_background_ratio),$ ERROR: code indent should use tabs where possible torvalds#253: FILE: mm/page-writeback.c:2093: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#253: FILE: mm/page-writeback.c:2093: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#254: FILE: mm/page-writeback.c:2094: + .proc_handler = dirty_background_ratio_handler,$ WARNING: please, no spaces at the start of a line torvalds#254: FILE: mm/page-writeback.c:2094: + .proc_handler = dirty_background_ratio_handler,$ ERROR: code indent should use tabs where possible torvalds#255: FILE: mm/page-writeback.c:2095: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#255: FILE: mm/page-writeback.c:2095: + .extra1 = SYSCTL_ZERO,$ ERROR: code indent should use tabs where possible torvalds#256: FILE: mm/page-writeback.c:2096: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#256: FILE: mm/page-writeback.c:2096: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#257: FILE: mm/page-writeback.c:2097: + },$ WARNING: please, no spaces at the start of a line torvalds#258: FILE: mm/page-writeback.c:2098: + {$ ERROR: code indent should use tabs where possible torvalds#259: FILE: mm/page-writeback.c:2099: + .procname = "dirty_background_bytes",$ WARNING: please, no spaces at the start of a line torvalds#259: FILE: mm/page-writeback.c:2099: + .procname = "dirty_background_bytes",$ ERROR: code indent should use tabs where possible torvalds#260: FILE: mm/page-writeback.c:2100: + .data = &dirty_background_bytes,$ WARNING: please, no spaces at the start of a line torvalds#260: FILE: mm/page-writeback.c:2100: + .data = &dirty_background_bytes,$ ERROR: code indent should use tabs where possible torvalds#261: FILE: mm/page-writeback.c:2101: + .maxlen = sizeof(dirty_background_bytes),$ WARNING: please, no spaces at the start of a line torvalds#261: FILE: mm/page-writeback.c:2101: + .maxlen = sizeof(dirty_background_bytes),$ ERROR: code indent should use tabs where possible torvalds#262: FILE: mm/page-writeback.c:2102: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#262: FILE: mm/page-writeback.c:2102: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#263: FILE: mm/page-writeback.c:2103: + .proc_handler = dirty_background_bytes_handler,$ WARNING: please, no spaces at the start of a line torvalds#263: FILE: mm/page-writeback.c:2103: + .proc_handler = dirty_background_bytes_handler,$ ERROR: code indent should use tabs where possible torvalds#264: FILE: mm/page-writeback.c:2104: + .extra1 = SYSCTL_LONG_ONE,$ WARNING: please, no spaces at the start of a line torvalds#264: FILE: mm/page-writeback.c:2104: + .extra1 = SYSCTL_LONG_ONE,$ WARNING: please, no spaces at the start of a line torvalds#265: FILE: mm/page-writeback.c:2105: + },$ WARNING: please, no spaces at the start of a line torvalds#266: FILE: mm/page-writeback.c:2106: + {$ ERROR: code indent should use tabs where possible torvalds#267: FILE: mm/page-writeback.c:2107: + .procname = "dirty_ratio",$ WARNING: please, no spaces at the start of a line torvalds#267: FILE: mm/page-writeback.c:2107: + .procname = "dirty_ratio",$ ERROR: code indent should use tabs where possible torvalds#268: FILE: mm/page-writeback.c:2108: + .data = &vm_dirty_ratio,$ WARNING: please, no spaces at the start of a line torvalds#268: FILE: mm/page-writeback.c:2108: + .data = &vm_dirty_ratio,$ ERROR: code indent should use tabs where possible torvalds#269: FILE: mm/page-writeback.c:2109: + .maxlen = sizeof(vm_dirty_ratio),$ WARNING: please, no spaces at the start of a line torvalds#269: FILE: mm/page-writeback.c:2109: + .maxlen = sizeof(vm_dirty_ratio),$ ERROR: code indent should use tabs where possible torvalds#270: FILE: mm/page-writeback.c:2110: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#270: FILE: mm/page-writeback.c:2110: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#271: FILE: mm/page-writeback.c:2111: + .proc_handler = dirty_ratio_handler,$ WARNING: please, no spaces at the start of a line torvalds#271: FILE: mm/page-writeback.c:2111: + .proc_handler = dirty_ratio_handler,$ ERROR: code indent should use tabs where possible torvalds#272: FILE: mm/page-writeback.c:2112: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#272: FILE: mm/page-writeback.c:2112: + .extra1 = SYSCTL_ZERO,$ ERROR: code indent should use tabs where possible torvalds#273: FILE: mm/page-writeback.c:2113: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#273: FILE: mm/page-writeback.c:2113: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#274: FILE: mm/page-writeback.c:2114: + },$ WARNING: please, no spaces at the start of a line torvalds#275: FILE: mm/page-writeback.c:2115: + {$ ERROR: code indent should use tabs where possible torvalds#276: FILE: mm/page-writeback.c:2116: + .procname = "dirty_bytes",$ WARNING: please, no spaces at the start of a line torvalds#276: FILE: mm/page-writeback.c:2116: + .procname = "dirty_bytes",$ ERROR: code indent should use tabs where possible torvalds#277: FILE: mm/page-writeback.c:2117: + .data = &vm_dirty_bytes,$ WARNING: please, no spaces at the start of a line torvalds#277: FILE: mm/page-writeback.c:2117: + .data = &vm_dirty_bytes,$ ERROR: code indent should use tabs where possible torvalds#278: FILE: mm/page-writeback.c:2118: + .maxlen = sizeof(vm_dirty_bytes),$ WARNING: please, no spaces at the start of a line torvalds#278: FILE: mm/page-writeback.c:2118: + .maxlen = sizeof(vm_dirty_bytes),$ ERROR: code indent should use tabs where possible torvalds#279: FILE: mm/page-writeback.c:2119: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#279: FILE: mm/page-writeback.c:2119: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#280: FILE: mm/page-writeback.c:2120: + .proc_handler = dirty_bytes_handler,$ WARNING: please, no spaces at the start of a line torvalds#280: FILE: mm/page-writeback.c:2120: + .proc_handler = dirty_bytes_handler,$ ERROR: code indent should use tabs where possible torvalds#281: FILE: mm/page-writeback.c:2121: + .extra1 = (void *)&dirty_bytes_min,$ WARNING: please, no spaces at the start of a line torvalds#281: FILE: mm/page-writeback.c:2121: + .extra1 = (void *)&dirty_bytes_min,$ WARNING: please, no spaces at the start of a line torvalds#282: FILE: mm/page-writeback.c:2122: + },$ WARNING: please, no spaces at the start of a line torvalds#283: FILE: mm/page-writeback.c:2123: + {$ ERROR: code indent should use tabs where possible torvalds#284: FILE: mm/page-writeback.c:2124: + .procname = "dirty_writeback_centisecs",$ WARNING: please, no spaces at the start of a line torvalds#284: FILE: mm/page-writeback.c:2124: + .procname = "dirty_writeback_centisecs",$ ERROR: code indent should use tabs where possible torvalds#285: FILE: mm/page-writeback.c:2125: + .data = &dirty_writeback_interval,$ WARNING: please, no spaces at the start of a line torvalds#285: FILE: mm/page-writeback.c:2125: + .data = &dirty_writeback_interval,$ ERROR: code indent should use tabs where possible torvalds#286: FILE: mm/page-writeback.c:2126: + .maxlen = sizeof(dirty_writeback_interval),$ WARNING: please, no spaces at the start of a line torvalds#286: FILE: mm/page-writeback.c:2126: + .maxlen = sizeof(dirty_writeback_interval),$ ERROR: code indent should use tabs where possible torvalds#287: FILE: mm/page-writeback.c:2127: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#287: FILE: mm/page-writeback.c:2127: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#288: FILE: mm/page-writeback.c:2128: + .proc_handler = dirty_writeback_centisecs_handler,$ WARNING: please, no spaces at the start of a line torvalds#288: FILE: mm/page-writeback.c:2128: + .proc_handler = dirty_writeback_centisecs_handler,$ WARNING: please, no spaces at the start of a line torvalds#289: FILE: mm/page-writeback.c:2129: + },$ WARNING: please, no spaces at the start of a line torvalds#290: FILE: mm/page-writeback.c:2130: + {$ ERROR: code indent should use tabs where possible torvalds#291: FILE: mm/page-writeback.c:2131: + .procname = "dirty_expire_centisecs",$ WARNING: please, no spaces at the start of a line torvalds#291: FILE: mm/page-writeback.c:2131: + .procname = "dirty_expire_centisecs",$ ERROR: code indent should use tabs where possible torvalds#292: FILE: mm/page-writeback.c:2132: + .data = &dirty_expire_interval,$ WARNING: please, no spaces at the start of a line torvalds#292: FILE: mm/page-writeback.c:2132: + .data = &dirty_expire_interval,$ ERROR: code indent should use tabs where possible torvalds#293: FILE: mm/page-writeback.c:2133: + .maxlen = sizeof(dirty_expire_interval),$ WARNING: please, no spaces at the start of a line torvalds#293: FILE: mm/page-writeback.c:2133: + .maxlen = sizeof(dirty_expire_interval),$ ERROR: code indent should use tabs where possible torvalds#294: FILE: mm/page-writeback.c:2134: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#294: FILE: mm/page-writeback.c:2134: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#295: FILE: mm/page-writeback.c:2135: + .proc_handler = proc_dointvec_minmax,$ WARNING: please, no spaces at the start of a line torvalds#295: FILE: mm/page-writeback.c:2135: + .proc_handler = proc_dointvec_minmax,$ ERROR: code indent should use tabs where possible torvalds#296: FILE: mm/page-writeback.c:2136: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#296: FILE: mm/page-writeback.c:2136: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#297: FILE: mm/page-writeback.c:2137: + },$ total: 37 errors, 49 warnings, 287 lines checked NOTE: For some of the reported defects, checkpatch may be able to mechanically convert to the typical style using --fix or --fix-inplace. NOTE: Whitespace errors detected. You may wish to use scripts/cleanpatch or scripts/cleanfile ./patches/mm-move-page-writeback-sysctls-to-is-own-file.patch has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Iurii Zaikin <yzaikin@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: zhanglianjie <zhanglianjie@uniontech.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

WARNING: please, no spaces at the start of a line torvalds#249: FILE: mm/page-writeback.c:2089: + {$ ERROR: code indent should use tabs where possible torvalds#250: FILE: mm/page-writeback.c:2090: + .procname = "dirty_background_ratio",$ WARNING: please, no spaces at the start of a line torvalds#250: FILE: mm/page-writeback.c:2090: + .procname = "dirty_background_ratio",$ ERROR: code indent should use tabs where possible torvalds#251: FILE: mm/page-writeback.c:2091: + .data = &dirty_background_ratio,$ WARNING: please, no spaces at the start of a line torvalds#251: FILE: mm/page-writeback.c:2091: + .data = &dirty_background_ratio,$ ERROR: code indent should use tabs where possible torvalds#252: FILE: mm/page-writeback.c:2092: + .maxlen = sizeof(dirty_background_ratio),$ WARNING: please, no spaces at the start of a line torvalds#252: FILE: mm/page-writeback.c:2092: + .maxlen = sizeof(dirty_background_ratio),$ ERROR: code indent should use tabs where possible torvalds#253: FILE: mm/page-writeback.c:2093: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#253: FILE: mm/page-writeback.c:2093: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#254: FILE: mm/page-writeback.c:2094: + .proc_handler = dirty_background_ratio_handler,$ WARNING: please, no spaces at the start of a line torvalds#254: FILE: mm/page-writeback.c:2094: + .proc_handler = dirty_background_ratio_handler,$ ERROR: code indent should use tabs where possible torvalds#255: FILE: mm/page-writeback.c:2095: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#255: FILE: mm/page-writeback.c:2095: + .extra1 = SYSCTL_ZERO,$ ERROR: code indent should use tabs where possible torvalds#256: FILE: mm/page-writeback.c:2096: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#256: FILE: mm/page-writeback.c:2096: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#257: FILE: mm/page-writeback.c:2097: + },$ WARNING: please, no spaces at the start of a line torvalds#258: FILE: mm/page-writeback.c:2098: + {$ ERROR: code indent should use tabs where possible torvalds#259: FILE: mm/page-writeback.c:2099: + .procname = "dirty_background_bytes",$ WARNING: please, no spaces at the start of a line torvalds#259: FILE: mm/page-writeback.c:2099: + .procname = "dirty_background_bytes",$ ERROR: code indent should use tabs where possible torvalds#260: FILE: mm/page-writeback.c:2100: + .data = &dirty_background_bytes,$ WARNING: please, no spaces at the start of a line torvalds#260: FILE: mm/page-writeback.c:2100: + .data = &dirty_background_bytes,$ ERROR: code indent should use tabs where possible torvalds#261: FILE: mm/page-writeback.c:2101: + .maxlen = sizeof(dirty_background_bytes),$ WARNING: please, no spaces at the start of a line torvalds#261: FILE: mm/page-writeback.c:2101: + .maxlen = sizeof(dirty_background_bytes),$ ERROR: code indent should use tabs where possible torvalds#262: FILE: mm/page-writeback.c:2102: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#262: FILE: mm/page-writeback.c:2102: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#263: FILE: mm/page-writeback.c:2103: + .proc_handler = dirty_background_bytes_handler,$ WARNING: please, no spaces at the start of a line torvalds#263: FILE: mm/page-writeback.c:2103: + .proc_handler = dirty_background_bytes_handler,$ ERROR: code indent should use tabs where possible torvalds#264: FILE: mm/page-writeback.c:2104: + .extra1 = SYSCTL_LONG_ONE,$ WARNING: please, no spaces at the start of a line torvalds#264: FILE: mm/page-writeback.c:2104: + .extra1 = SYSCTL_LONG_ONE,$ WARNING: please, no spaces at the start of a line torvalds#265: FILE: mm/page-writeback.c:2105: + },$ WARNING: please, no spaces at the start of a line torvalds#266: FILE: mm/page-writeback.c:2106: + {$ ERROR: code indent should use tabs where possible torvalds#267: FILE: mm/page-writeback.c:2107: + .procname = "dirty_ratio",$ WARNING: please, no spaces at the start of a line torvalds#267: FILE: mm/page-writeback.c:2107: + .procname = "dirty_ratio",$ ERROR: code indent should use tabs where possible torvalds#268: FILE: mm/page-writeback.c:2108: + .data = &vm_dirty_ratio,$ WARNING: please, no spaces at the start of a line torvalds#268: FILE: mm/page-writeback.c:2108: + .data = &vm_dirty_ratio,$ ERROR: code indent should use tabs where possible torvalds#269: FILE: mm/page-writeback.c:2109: + .maxlen = sizeof(vm_dirty_ratio),$ WARNING: please, no spaces at the start of a line torvalds#269: FILE: mm/page-writeback.c:2109: + .maxlen = sizeof(vm_dirty_ratio),$ ERROR: code indent should use tabs where possible torvalds#270: FILE: mm/page-writeback.c:2110: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#270: FILE: mm/page-writeback.c:2110: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#271: FILE: mm/page-writeback.c:2111: + .proc_handler = dirty_ratio_handler,$ WARNING: please, no spaces at the start of a line torvalds#271: FILE: mm/page-writeback.c:2111: + .proc_handler = dirty_ratio_handler,$ ERROR: code indent should use tabs where possible torvalds#272: FILE: mm/page-writeback.c:2112: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#272: FILE: mm/page-writeback.c:2112: + .extra1 = SYSCTL_ZERO,$ ERROR: code indent should use tabs where possible torvalds#273: FILE: mm/page-writeback.c:2113: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#273: FILE: mm/page-writeback.c:2113: + .extra2 = SYSCTL_ONE_HUNDRED,$ WARNING: please, no spaces at the start of a line torvalds#274: FILE: mm/page-writeback.c:2114: + },$ WARNING: please, no spaces at the start of a line torvalds#275: FILE: mm/page-writeback.c:2115: + {$ ERROR: code indent should use tabs where possible torvalds#276: FILE: mm/page-writeback.c:2116: + .procname = "dirty_bytes",$ WARNING: please, no spaces at the start of a line torvalds#276: FILE: mm/page-writeback.c:2116: + .procname = "dirty_bytes",$ ERROR: code indent should use tabs where possible torvalds#277: FILE: mm/page-writeback.c:2117: + .data = &vm_dirty_bytes,$ WARNING: please, no spaces at the start of a line torvalds#277: FILE: mm/page-writeback.c:2117: + .data = &vm_dirty_bytes,$ ERROR: code indent should use tabs where possible torvalds#278: FILE: mm/page-writeback.c:2118: + .maxlen = sizeof(vm_dirty_bytes),$ WARNING: please, no spaces at the start of a line torvalds#278: FILE: mm/page-writeback.c:2118: + .maxlen = sizeof(vm_dirty_bytes),$ ERROR: code indent should use tabs where possible torvalds#279: FILE: mm/page-writeback.c:2119: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#279: FILE: mm/page-writeback.c:2119: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#280: FILE: mm/page-writeback.c:2120: + .proc_handler = dirty_bytes_handler,$ WARNING: please, no spaces at the start of a line torvalds#280: FILE: mm/page-writeback.c:2120: + .proc_handler = dirty_bytes_handler,$ ERROR: code indent should use tabs where possible torvalds#281: FILE: mm/page-writeback.c:2121: + .extra1 = (void *)&dirty_bytes_min,$ WARNING: please, no spaces at the start of a line torvalds#281: FILE: mm/page-writeback.c:2121: + .extra1 = (void *)&dirty_bytes_min,$ WARNING: please, no spaces at the start of a line torvalds#282: FILE: mm/page-writeback.c:2122: + },$ WARNING: please, no spaces at the start of a line torvalds#283: FILE: mm/page-writeback.c:2123: + {$ ERROR: code indent should use tabs where possible torvalds#284: FILE: mm/page-writeback.c:2124: + .procname = "dirty_writeback_centisecs",$ WARNING: please, no spaces at the start of a line torvalds#284: FILE: mm/page-writeback.c:2124: + .procname = "dirty_writeback_centisecs",$ ERROR: code indent should use tabs where possible torvalds#285: FILE: mm/page-writeback.c:2125: + .data = &dirty_writeback_interval,$ WARNING: please, no spaces at the start of a line torvalds#285: FILE: mm/page-writeback.c:2125: + .data = &dirty_writeback_interval,$ ERROR: code indent should use tabs where possible torvalds#286: FILE: mm/page-writeback.c:2126: + .maxlen = sizeof(dirty_writeback_interval),$ WARNING: please, no spaces at the start of a line torvalds#286: FILE: mm/page-writeback.c:2126: + .maxlen = sizeof(dirty_writeback_interval),$ ERROR: code indent should use tabs where possible torvalds#287: FILE: mm/page-writeback.c:2127: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#287: FILE: mm/page-writeback.c:2127: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#288: FILE: mm/page-writeback.c:2128: + .proc_handler = dirty_writeback_centisecs_handler,$ WARNING: please, no spaces at the start of a line torvalds#288: FILE: mm/page-writeback.c:2128: + .proc_handler = dirty_writeback_centisecs_handler,$ WARNING: please, no spaces at the start of a line torvalds#289: FILE: mm/page-writeback.c:2129: + },$ WARNING: please, no spaces at the start of a line torvalds#290: FILE: mm/page-writeback.c:2130: + {$ ERROR: code indent should use tabs where possible torvalds#291: FILE: mm/page-writeback.c:2131: + .procname = "dirty_expire_centisecs",$ WARNING: please, no spaces at the start of a line torvalds#291: FILE: mm/page-writeback.c:2131: + .procname = "dirty_expire_centisecs",$ ERROR: code indent should use tabs where possible torvalds#292: FILE: mm/page-writeback.c:2132: + .data = &dirty_expire_interval,$ WARNING: please, no spaces at the start of a line torvalds#292: FILE: mm/page-writeback.c:2132: + .data = &dirty_expire_interval,$ ERROR: code indent should use tabs where possible torvalds#293: FILE: mm/page-writeback.c:2133: + .maxlen = sizeof(dirty_expire_interval),$ WARNING: please, no spaces at the start of a line torvalds#293: FILE: mm/page-writeback.c:2133: + .maxlen = sizeof(dirty_expire_interval),$ ERROR: code indent should use tabs where possible torvalds#294: FILE: mm/page-writeback.c:2134: + .mode = 0644,$ WARNING: please, no spaces at the start of a line torvalds#294: FILE: mm/page-writeback.c:2134: + .mode = 0644,$ ERROR: code indent should use tabs where possible torvalds#295: FILE: mm/page-writeback.c:2135: + .proc_handler = proc_dointvec_minmax,$ WARNING: please, no spaces at the start of a line torvalds#295: FILE: mm/page-writeback.c:2135: + .proc_handler = proc_dointvec_minmax,$ ERROR: code indent should use tabs where possible torvalds#296: FILE: mm/page-writeback.c:2136: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#296: FILE: mm/page-writeback.c:2136: + .extra1 = SYSCTL_ZERO,$ WARNING: please, no spaces at the start of a line torvalds#297: FILE: mm/page-writeback.c:2137: + },$ total: 37 errors, 49 warnings, 287 lines checked NOTE: For some of the reported defects, checkpatch may be able to mechanically convert to the typical style using --fix or --fix-inplace. NOTE: Whitespace errors detected. You may wish to use scripts/cleanpatch or scripts/cleanfile ./patches/mm-move-page-writeback-sysctls-to-is-own-file.patch has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Iurii Zaikin <yzaikin@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: zhanglianjie <zhanglianjie@uniontech.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mark Brown <broonie@kernel.org>

…_lock BugLink: https://bugs.launchpad.net/bugs/1958287 [ Upstream commit 598ad0b ] Taking sb_writers whilst holding mmap_lock isn't allowed and will result in a lockdep warning like that below. The problem comes from cachefiles needing to take the sb_writers lock in order to do a write to the cache, but being asked to do this by netfslib called from readpage, readahead or write_begin[1]. Fix this by always offloading the write to the cache off to a worker thread. The main thread doesn't need to wait for it, so deadlock can be avoided. This can be tested by running the quick xfstests on something like afs or ceph with lockdep enabled. WARNING: possible circular locking dependency detected 5.15.0-rc1-build2+ torvalds#292 Not tainted ------------------------------------------------------ holetest/65517 is trying to acquire lock: ffff88810c81d730 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_fault+0x276/0x7a5 but task is already holding lock: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock#2){++++}-{3:3}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b __might_fault+0x87/0xb1 strncpy_from_user+0x25/0x18c removexattr+0x7c/0xe5 __do_sys_fremovexattr+0x73/0x96 do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #1 (sb_writers#10){.+.+}-{0:0}: validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b cachefiles_write+0x2b3/0x4bb netfs_rreq_do_write_to_cache+0x3b5/0x432 netfs_readpage+0x2de/0x39d filemap_read_page+0x51/0x94 filemap_get_pages+0x26f/0x413 filemap_read+0x182/0x427 new_sync_read+0xf0/0x161 vfs_read+0x118/0x16e ksys_read+0xb8/0x12e do_syscall_64+0x67/0x7a entry_SYSCALL_64_after_hwframe+0x44/0xae -> #0 (mapping.invalidate_lock#3){.+.+}-{3:3}: check_noncircular+0xe4/0x129 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b down_read+0x40/0x4a filemap_fault+0x276/0x7a5 __do_fault+0x96/0xbf do_fault+0x262/0x35a __handle_mm_fault+0x171/0x1b5 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c exc_page_fault+0x85/0xa5 asm_exc_page_fault+0x1e/0x30 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#3 --> sb_writers#10 --> &mm->mmap_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(sb_writers#10); lock(&mm->mmap_lock#2); lock(mapping.invalidate_lock#3); *** DEADLOCK *** 1 lock held by holetest/65517: #0: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c stack backtrace: CPU: 0 PID: 65517 Comm: holetest Not tainted 5.15.0-rc1-build2+ torvalds#292 Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014 Call Trace: dump_stack_lvl+0x45/0x59 check_noncircular+0xe4/0x129 ? print_circular_bug+0x207/0x207 ? validate_chain+0x461/0x4a8 ? add_chain_block+0x88/0xd9 ? hlist_add_head_rcu+0x49/0x53 check_prev_add+0x16b/0x3a4 validate_chain+0x3c4/0x4a8 ? check_prev_add+0x3a4/0x3a4 ? mark_lock+0xa5/0x1c6 __lock_acquire+0x89d/0x949 lock_acquire+0x2dc/0x34b ? filemap_fault+0x276/0x7a5 ? rcu_read_unlock+0x59/0x59 ? add_to_page_cache_lru+0x13c/0x13c ? lock_is_held_type+0x7b/0xd3 down_read+0x40/0x4a ? filemap_fault+0x276/0x7a5 filemap_fault+0x276/0x7a5 ? pagecache_get_page+0x2dd/0x2dd ? __lock_acquire+0x8bc/0x949 ? pte_offset_kernel.isra.0+0x6d/0xc3 __do_fault+0x96/0xbf ? do_fault+0x124/0x35a do_fault+0x262/0x35a ? handle_pte_fault+0x1c1/0x20d __handle_mm_fault+0x171/0x1b5 ? handle_pte_fault+0x20d/0x20d ? __lock_release+0x151/0x254 ? mark_held_locks+0x1f/0x78 ? rcu_read_unlock+0x3a/0x59 handle_mm_fault+0x12a/0x233 do_user_addr_fault+0x3d2/0x59c ? pgtable_bad+0x70/0x70 ? rcu_read_lock_bh_held+0xab/0xab exc_page_fault+0x85/0xa5 ? asm_exc_page_fault+0x8/0x30 asm_exc_page_fault+0x1e/0x30 RIP: 0033:0x40192f Code: ff 48 89 c3 48 8b 05 50 28 00 00 48 85 ed 7e 23 31 d2 4b 8d 0c 2f eb 0a 0f 1f 00 48 8b 05 39 28 00 00 48 0f af c2 48 83 c2 01 <48> 89 1c 01 48 39 d5 7f e8 8b 0d f2 27 00 00 31 c0 85 c9 74 0e 8b RSP: 002b:00007f9931867eb0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007f9931868700 RCX: 00007f993206ac00 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007ffc13e06ee0 RBP: 0000000000000100 R08: 0000000000000000 R09: 00007f9931868700 R10: 00007f99318689d0 R11: 0000000000000202 R12: 00007ffc13e06ee0 R13: 0000000000000c00 R14: 00007ffc13e06e00 R15: 00007f993206a000 Fixes: 726218f ("netfs: Define an interface to talk to a cache") Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Jeff Layton <jlayton@kernel.org> cc: Jan Kara <jack@suse.cz> cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/ [1] Link: https://lore.kernel.org/r/163887597541.1596626.2668163316598972956.stgit@warthog.procyon.org.uk/ # v1 Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

This commit provides a watchdog timer that sets a limit of how long a single sub-test could run: - if sub-test runs for 10 seconds, the name of the test is printed (currently the name of the test is printed only after it finishes); - if sub-test runs for 120 seconds, the running thread is terminated with SIGSEGV (to trigger crash_handler() and get a stack trace). Specifically: - the timer is armed on each call to run_one_test(); - re-armed at each call to test__start_subtest(); - is stopped when exiting run_one_test(). Default timeout could be overridden using '-w' or '--watchdog-timeout' options. Value 0 can be used to turn the timer off. Here is an example execution: $ ./ssh-exec.sh ./test_progs -w 5 -t \ send_signal/send_signal_perf_thread_remote,send_signal/send_signal_nmi_thread_remote WATCHDOG: test case send_signal/send_signal_nmi_thread_remote executes for 5 seconds, terminating with SIGSEGV Caught signal torvalds#11! Stack trace: ./test_progs(crash_handler+0x1f)[0x9049ef] /lib64/libc.so.6(+0x40d00)[0x7f1f1184fd00] /lib64/libc.so.6(read+0x4a)[0x7f1f1191cc4a] ./test_progs[0x720dd3] ./test_progs[0x71ef7a] ./test_progs(test_send_signal+0x1db)[0x71edeb] ./test_progs[0x9066c5] ./test_progs(main+0x5ed)[0x9054ad] /lib64/libc.so.6(+0x2a088)[0x7f1f11839088] /lib64/libc.so.6(__libc_start_main+0x8b)[0x7f1f1183914b] ./test_progs(_start+0x25)[0x527385] torvalds#292 send_signal:FAIL test_send_signal_common:PASS:reading pipe 0 nsec test_send_signal_common:PASS:reading pipe error: size 0 0 nsec test_send_signal_common:PASS:incorrect result 0 nsec test_send_signal_common:PASS:pipe_write 0 nsec test_send_signal_common:PASS:setpriority 0 nsec Timer is implemented using timer_{create,start} librt API. Internally librt uses pthreads for SIGEV_THREAD timers, so this change adds a background timer thread to the test process. Because of this a few checks in tests 'bpf_iter' and 'iters' need an update to account for an extra thread. For parallelized scenario the watchdog is also created for each worker fork. If one of the workers gets stuck, it would be terminated by a watchdog. In theory, this might lead to a scenario when all worker threads are exhausted, however this should not be a problem for server_main(), as it would exit with some of the tests not run. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

This commit provides a watchdog timer that sets a limit of how long a single sub-test could run: - if sub-test runs for 10 seconds, the name of the test is printed (currently the name of the test is printed only after it finishes); - if sub-test runs for 120 seconds, the running thread is terminated with SIGSEGV (to trigger crash_handler() and get a stack trace). Specifically: - the timer is armed on each call to run_one_test(); - re-armed at each call to test__start_subtest(); - is stopped when exiting run_one_test(). Default timeout could be overridden using '-w' or '--watchdog-timeout' options. Value 0 can be used to turn the timer off. Here is an example execution: $ ./ssh-exec.sh ./test_progs -w 5 -t \ send_signal/send_signal_perf_thread_remote,send_signal/send_signal_nmi_thread_remote WATCHDOG: test case send_signal/send_signal_nmi_thread_remote executes for 5 seconds, terminating with SIGSEGV Caught signal #11! Stack trace: ./test_progs(crash_handler+0x1f)[0x9049ef] /lib64/libc.so.6(+0x40d00)[0x7f1f1184fd00] /lib64/libc.so.6(read+0x4a)[0x7f1f1191cc4a] ./test_progs[0x720dd3] ./test_progs[0x71ef7a] ./test_progs(test_send_signal+0x1db)[0x71edeb] ./test_progs[0x9066c5] ./test_progs(main+0x5ed)[0x9054ad] /lib64/libc.so.6(+0x2a088)[0x7f1f11839088] /lib64/libc.so.6(__libc_start_main+0x8b)[0x7f1f1183914b] ./test_progs(_start+0x25)[0x527385] torvalds#292 send_signal:FAIL test_send_signal_common:PASS:reading pipe 0 nsec test_send_signal_common:PASS:reading pipe error: size 0 0 nsec test_send_signal_common:PASS:incorrect result 0 nsec test_send_signal_common:PASS:pipe_write 0 nsec test_send_signal_common:PASS:setpriority 0 nsec Timer is implemented using timer_{create,start} librt API. Internally librt uses pthreads for SIGEV_THREAD timers, so this change adds a background timer thread to the test process. Because of this a few checks in tests 'bpf_iter' and 'iters' need an update to account for an extra thread. For parallelized scenario the watchdog is also created for each worker fork. If one of the workers gets stuck, it would be terminated by a watchdog. In theory, this might lead to a scenario when all worker threads are exhausted, however this should not be a problem for server_main(), as it would exit with some of the tests not run. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20241112110906.3045278-2-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>

escalator2015 added 4 commits May 25, 2016 17:21

Updated for Wolfson WM8742 support

de8d74b

Updated for Wolfson WM8742 support

2b60c62

Wolfson WM8742 DAC driver added

d0b4bbb

Wolfson WM8742 DAC driver

da68433

escalator2015 closed this May 26, 2016

nbdd0121 pushed a commit to nbdd0121/linux that referenced this pull request May 26, 2021

Merge pull request torvalds#292 from TheSven73/rust-for-linux-pin-wra…

50f2249

…pper Improve safety with fallible version of `pointer::pin()`

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

ASoc Driver for Wolfson WM8742 DAC #292

ASoc Driver for Wolfson WM8742 DAC #292

escalator2015 commented May 25, 2016

FadeMind commented May 25, 2016

escalator2015 commented May 26, 2016

ASoc Driver for Wolfson WM8742 DAC #292

ASoc Driver for Wolfson WM8742 DAC #292

Conversation

escalator2015 commented May 25, 2016

FadeMind commented May 25, 2016

escalator2015 commented May 26, 2016