linux-kernel - [PATCH 5/6] hw_breakpoints: Only force perf events if breakpoints are selected

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Message-Id: <1310655837-328-6-git-send-email-fweisbec@gmail.com>
Date:	Thu, 14 Jul 2011 17:03:56 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Will Deacon <will.deacon@....com>,
	Prasad <prasad@...ux.vnet.ibm.com>
Subject: [PATCH 5/6] hw_breakpoints: Only force perf events if breakpoints are selected

Previously, arch were forced to always build perf events if they
supported hw_breakpoints.

Now that the user can choose not to build hw_breakpoints, let
only force perf events if hw_breakpoints are selected.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Acked-by: Paul Mundt <lethal@...ux-sh.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Will Deacon <will.deacon@....com>
Cc: Prasad <prasad@...ux.vnet.ibm.com>
---
 arch/sh/Kconfig  |    1 -
 arch/x86/Kconfig |    1 -
 init/Kconfig     |    1 +
 3 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 0a59a82..7130d4b 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -46,7 +46,6 @@ config SUPERH32
 	select HAVE_HW_BREAKPOINT
 	select HW_BREAKPOINT
 	select HAVE_MIXED_BREAKPOINTS_REGS
-	select PERF_EVENTS
 	select ARCH_HIBERNATION_POSSIBLE if MMU
 	select SPARSE_IRQ
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d7a255d..67979f4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -54,7 +54,6 @@ config X86
 	select HAVE_KERNEL_LZO
 	select HAVE_HW_BREAKPOINT
 	select HAVE_MIXED_BREAKPOINTS_REGS
-	select PERF_EVENTS
 	select HAVE_PERF_EVENTS_NMI
 	select ANON_INODES
 	select HAVE_ARCH_KMEMCHECK
diff --git a/init/Kconfig b/init/Kconfig
index 9eec0df..3cf7855 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -926,6 +926,7 @@ menuconfig EXPERT
 config HW_BREAKPOINT
 	bool "Hardware breakpoints" if EXPERT
 	depends on HAVE_HW_BREAKPOINT
+	select PERF_EVENTS
 	default y
 	help
 	  Hardware breakpoints are a feature implemented by most CPUs
-- 
1.7.5.4

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