tools: move alignment-related macros to new <linux/align.h>

commit 10a04ff upstream.

Currently, tools have *ALIGN*() macros scattered across the unrelated
headers, as there are only 3 of them and they were added separately
each time on an as-needed basis.
Anyway, let's make it more consistent with the kernel headers and allow
using those macros outside of the mentioned headers. Create
<linux/align.h> inside the tools/ folder and include it where needed.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/include/linux/align.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _TOOLS_LINUX_ALIGN_H
+#define _TOOLS_LINUX_ALIGN_H
+
+#include <uapi/linux/const.h>
+
+#define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
+#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
+#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
+
+#endif /* _TOOLS_LINUX_ALIGN_H */

tools/include/linux/bitmap.h

@@ -3,6 +3,7 @@
 #define _TOOLS_LINUX_BITMAP_H
 
 #include <string.h>
+#include <linux/align.h>
 #include <linux/bitops.h>
 #include <linux/find.h>
 #include <stdlib.h>
@@ -127,7 +128,6 @@ static inline bool bitmap_and(unsigned long *dst, const unsigned long *src1,
 #define BITMAP_MEM_ALIGNMENT (8 * sizeof(unsigned long))
 #endif
 #define BITMAP_MEM_MASK (BITMAP_MEM_ALIGNMENT - 1)
-#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
 
 static inline bool bitmap_equal(const unsigned long *src1,
  const unsigned long *src2, unsigned int nbits)

tools/include/linux/mm.h

@@ -2,18 +2,15 @@
 #ifndef _TOOLS_LINUX_MM_H
 #define _TOOLS_LINUX_MM_H
 
+#include <linux/align.h>
 #include <linux/mmzone.h>
-#include <uapi/linux/const.h>
 
 #define PAGE_SHIFT 12
 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
 #define PAGE_MASK (~(PAGE_SIZE - 1))
 
 #define PHYS_ADDR_MAX (~(phys_addr_t)0)
 
-#define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
-#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
-
 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 
 #define __va(x) ((void *)((unsigned long)(x)))