perf_counter, x86: remove ack_status() from struct x86_pmu

This function is Intel only and not necessary for AMD cpus.

[ Impact: simplify code ]

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241002046-8832-11-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/perf_counter.c

@@ -51,7 +51,6 @@ struct x86_pmu {
  int (*handle_irq)(struct pt_regs *, int);
  u64 (*save_disable_all)(void);
  void (*restore_all)(u64);
- void (*ack_status)(u64);
  void (*enable)(int, u64);
  void (*disable)(int, u64);
  unsigned eventsel;
@@ -415,23 +414,11 @@ static inline u64 intel_pmu_get_status(u64 mask)
  return status;
 }
 
-static void intel_pmu_ack_status(u64 ack)
+static inline void intel_pmu_ack_status(u64 ack)
 {
  wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack);
 }
 
-static void amd_pmu_ack_status(u64 ack)
-{
-}
-
-static void hw_perf_ack_status(u64 ack)
-{
- if (unlikely(!perf_counters_initialized))
- return;
-
- x86_pmu->ack_status(ack);
-}
-
 static void intel_pmu_enable_counter(int idx, u64 config)
 {
  wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + idx,
@@ -788,7 +775,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs, int nmi)
  __x86_pmu_disable(counter, &counter->hw, bit);
  }
 
- hw_perf_ack_status(ack);
+ intel_pmu_ack_status(ack);
 
  /*
  * Repeat if there is more work to be done:
@@ -904,7 +891,6 @@ static struct x86_pmu intel_pmu = {
  .handle_irq = intel_pmu_handle_irq,
  .save_disable_all = intel_pmu_save_disable_all,
  .restore_all = intel_pmu_restore_all,
- .ack_status = intel_pmu_ack_status,
  .enable = intel_pmu_enable_counter,
  .disable = intel_pmu_disable_counter,
  .eventsel = MSR_ARCH_PERFMON_EVENTSEL0,
@@ -918,7 +904,6 @@ static struct x86_pmu amd_pmu = {
  .handle_irq = amd_pmu_handle_irq,
  .save_disable_all = amd_pmu_save_disable_all,
  .restore_all = amd_pmu_restore_all,
- .ack_status = amd_pmu_ack_status,
  .enable = amd_pmu_enable_counter,
  .disable = amd_pmu_disable_counter,
  .eventsel = MSR_K7_EVNTSEL0,