linux-kernel - [tip:perf/core] perf/x86: Save a few bytes in 'struct x86

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Message-ID: <tip-vsevd5g8lhcn129n3s7trl7r@git.kernel.org>
Date:	Thu, 5 Jul 2012 23:29:34 -0700
From:	tip-bot for Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de, bp@...64.org
Subject: [tip:perf/core] perf/x86: Save a few bytes in 'struct x86_pmu'

Commit-ID:  3e0091e2b6f8cd59e567f247e345a3a6ad1f6e7e
Gitweb:     http://git.kernel.org/tip/3e0091e2b6f8cd59e567f247e345a3a6ad1f6e7e
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Tue, 26 Jun 2012 23:38:39 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 5 Jul 2012 21:55:58 +0200

perf/x86: Save a few bytes in 'struct x86_pmu'

All these are basically boolean flags, use a bitfield to save a few
bytes.

Suggested-by: Borislav Petkov <bp@...64.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/n/tip-vsevd5g8lhcn129n3s7trl7r@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/perf_event.h |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 3f5c669..a15df4b 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -374,8 +374,11 @@ struct x86_pmu {
 	/*
 	 * Intel DebugStore bits
 	 */
-	int		bts, pebs;
-	int		bts_active, pebs_active, pebs_broken;
+	int		bts		:1,
+			bts_active	:1,
+			pebs		:1,
+			pebs_active	:1,
+			pebs_broken	:1;
 	int		pebs_record_size;
 	void		(*drain_pebs)(struct pt_regs *regs);
 	struct event_constraint *pebs_constraints;
--
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