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>

1 files changed, 2 insertions, 17 deletions

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index d0bb02919c63..6bbdc16cc69f 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/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 @@ again:
                         __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,