linux-kernel - [tip:perf/core] x86,kgdb: Always initialize the hw breakpoint attribute

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Message-ID: <tip-ab310b5edb8b601bcb02491ed6f7676da4fd1757@git.kernel.org>
Date:	Fri, 2 Apr 2010 19:06:22 GMT
From:	tip-bot for Jason Wessel <jason.wessel@...driver.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fweisbec@...il.com, jason.wessel@...driver.com, stable@...nel.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/core] x86,kgdb: Always initialize the hw breakpoint attribute

Commit-ID:  ab310b5edb8b601bcb02491ed6f7676da4fd1757
Gitweb:     http://git.kernel.org/tip/ab310b5edb8b601bcb02491ed6f7676da4fd1757
Author:     Jason Wessel <jason.wessel@...driver.com>
AuthorDate: Tue, 30 Mar 2010 14:05:07 -0500
Committer:  Frederic Weisbecker <fweisbec@...il.com>
CommitDate: Thu, 1 Apr 2010 08:26:32 +0200

x86,kgdb: Always initialize the hw breakpoint attribute

It is required to call hw_breakpoint_init() on an attr before using it
in any other calls.  This fixes the problem where kgdb will sometimes
fail to initialize on x86_64.

Signed-off-by: Jason Wessel <jason.wessel@...driver.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: 2.6.33 <stable@...nel.org>
LKML-Reference: <1269975907-27602-1-git-send-email-jason.wessel@...driver.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 arch/x86/kernel/kgdb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index bfba601..b2258ca 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -618,8 +618,8 @@ int kgdb_arch_init(void)
 	 * portion of kgdb because this operation requires mutexs to
 	 * complete.
 	 */
+	hw_breakpoint_init(&attr);
 	attr.bp_addr = (unsigned long)kgdb_arch_init;
-	attr.type = PERF_TYPE_BREAKPOINT;
 	attr.bp_len = HW_BREAKPOINT_LEN_1;
 	attr.bp_type = HW_BREAKPOINT_W;
 	attr.disabled = 1;
--
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