perf/x86/intel/lbr: Kill off intel_pmu_needs_lbr_smpl for good

The x86_lbr_exclusive commit (4807034248be "perf/x86: Mark Intel PT and
LBR/BTS as mutually exclusive") mistakenly moved intel_pmu_needs_lbr_smpl()
to perf_event.h, while another commit (a46a2300019 "perf: Simplify the
branch stack check") removed it in favor of needs_branch_stack().

This patch gets rid of intel_pmu_needs_lbr_smpl() for good.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@infradead.org
Cc: adrian.hunter@intel.com
Cc: hpa@zytor.com
Link: http://lkml.kernel.org/r/1435140349-32588-3-git-send-email-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 3e7fd27dfe201718860185be3fe5eeb3c028ed5c..3474cf26b6c42a6bb69b0a219b9651a19cd750f4 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -808,20 +808,6 @@ static inline int amd_pmu_init(void)
 
 #ifdef CONFIG_CPU_SUP_INTEL
 
-static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
-{
-       /* user explicitly requested branch sampling */
-       if (has_branch_stack(event))
-               return true;
-
-       /* implicit branch sampling to correct PEBS skid */
-       if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1 &&
-           x86_pmu.intel_cap.pebs_format < 2)
-               return true;
-
-       return false;
-}
-
 static inline bool intel_pmu_has_bts(struct perf_event *event)
 {
        if (event->attr.config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS &&