linux-kernel - [tip:perf/core] perf/x86/intel/lbr: Kill off intel_pmu_needs_lbr

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Message-ID: <tip-c749b3e96398fcc39286267b72fb8b85c0f757ea@git.kernel.org>
Date:	Tue, 4 Aug 2015 01:53:34 -0700
From:	tip-bot for Alexander Shishkin <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, mingo@...nel.org,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	alexander.shishkin@...ux.intel.com, hpa@...or.com,
	peterz@...radead.org
Subject: [tip:perf/core] perf/x86/intel/lbr:
  Kill off intel_pmu_needs_lbr_smpl for good

Commit-ID:  c749b3e96398fcc39286267b72fb8b85c0f757ea
Gitweb:     http://git.kernel.org/tip/c749b3e96398fcc39286267b72fb8b85c0f757ea
Author:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>
AuthorDate: Wed, 24 Jun 2015 13:05:49 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 4 Aug 2015 10:16:53 +0200

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@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: acme@...radead.org
Cc: adrian.hunter@...el.com
Cc: hpa@...or.com
Link: http://lkml.kernel.org/r/1435140349-32588-3-git-send-email-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/perf_event.h | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 3e7fd27..3474cf2 100644
--- 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 &&
--
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