perf_counter, x86: remove get_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: <1241002046-8832-10-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 9d90de0..d0bb029 100644 (file)
--- 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);
-       u64             (*get_status)(u64);
        void            (*ack_status)(u64);
        void            (*enable)(int, u64);
        void            (*disable)(int, u64);
@@ -405,41 +404,15 @@ void hw_perf_restore(u64 ctrl)
  */
 EXPORT_SYMBOL_GPL(hw_perf_restore);
 
-static u64 intel_pmu_get_status(u64 mask)
+static inline u64 intel_pmu_get_status(u64 mask)
 {
        u64 status;
 
-       rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
-
-       return status;
-}
-
-static u64 amd_pmu_get_status(u64 mask)
-{
-       u64 status = 0;
-       int idx;
-
-       for (idx = 0; idx < nr_counters_generic; idx++) {
-               s64 val;
-
-               if (!(mask & (1 << idx)))
-                       continue;
-
-               rdmsrl(MSR_K7_PERFCTR0 + idx, val);
-               val <<= (64 - counter_value_bits);
-               if (val >= 0)
-                       status |= (1 << idx);
-       }
-
-       return status;
-}
-
-static u64 hw_perf_get_status(u64 mask)
-{
        if (unlikely(!perf_counters_initialized))
                return 0;
+       rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
 
-       return x86_pmu->get_status(mask);
+       return status;
 }
 
 static void intel_pmu_ack_status(u64 ack)
@@ -795,7 +768,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs, int nmi)
 
        cpuc->throttle_ctrl = hw_perf_save_disable();
 
-       status = hw_perf_get_status(cpuc->throttle_ctrl);
+       status = intel_pmu_get_status(cpuc->throttle_ctrl);
        if (!status)
                goto out;
 
@@ -820,7 +793,7 @@ again:
        /*
         * Repeat if there is more work to be done:
         */
-       status = hw_perf_get_status(cpuc->throttle_ctrl);
+       status = intel_pmu_get_status(cpuc->throttle_ctrl);
        if (status)
                goto again;
 out:
@@ -931,7 +904,6 @@ 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,
-       .get_status             = intel_pmu_get_status,
        .ack_status             = intel_pmu_ack_status,
        .enable                 = intel_pmu_enable_counter,
        .disable                = intel_pmu_disable_counter,
@@ -946,7 +918,6 @@ 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,
-       .get_status             = amd_pmu_get_status,
        .ack_status             = amd_pmu_ack_status,
        .enable                 = amd_pmu_enable_counter,
        .disable                = amd_pmu_disable_counter,