x86: perf_counter remove unwanted hw_perf_enable_all

Impact: clean, reduce kernel size a bit, avoid sparse warnings

Fixes sparse warnings:

 arch/x86/kernel/cpu/perf_counter.c:153:6: warning: symbol 'hw_perf_enable_all' was not declared. Should it be static?
 arch/x86/kernel/cpu/perf_counter.c:279:3: warning: returning void-valued expression
 arch/x86/kernel/cpu/perf_counter.c:206:3: warning: returning void-valued expression
 arch/x86/kernel/cpu/perf_counter.c:206:3: warning: returning void-valued expression

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 17 deletions

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index da46eca12543..9376771f757b 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -150,14 +150,6 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
         return 0;
 }
 
-void hw_perf_enable_all(void)
-{
-        if (unlikely(!perf_counters_initialized))
-                return;
-
-        wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, perf_counter_mask);
-}
-
 u64 hw_perf_save_disable(void)
 {
         u64 ctrl;
@@ -200,12 +192,10 @@ static inline void
 __pmc_generic_disable(struct perf_counter *counter,
                            struct hw_perf_counter *hwc, unsigned int idx)
 {
-        int err;
-
         if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL))
-                return __pmc_fixed_disable(counter, hwc, idx);
-
-        err = wrmsr_safe(hwc->config_base + idx, hwc->config, 0);
+                __pmc_fixed_disable(counter, hwc, idx);
+        else
+                wrmsr_safe(hwc->config_base + idx, hwc->config, 0);
 }
 
 static DEFINE_PER_CPU(u64, prev_left[X86_PMC_IDX_MAX]);
@@ -276,10 +266,10 @@ __pmc_generic_enable(struct perf_counter *counter,
                           struct hw_perf_counter *hwc, int idx)
 {
         if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL))
-                return __pmc_fixed_enable(counter, hwc, idx);
-
-        wrmsr(hwc->config_base + idx,
-              hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE, 0);
+                __pmc_fixed_enable(counter, hwc, idx);
+        else
+                wrmsr(hwc->config_base + idx,
+                      hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE, 0);
 }
 
 static int