linux-kernel - [tip:tracing/core] x86, ds: dont use TIF

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Date:	Thu, 7 May 2009 09:24:32 GMT
From:	tip-bot for Markus Metzger <markus.t.metzger@...el.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	markus.t.metzger@...el.com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:tracing/core] x86, ds: dont use TIF_DEBUGCTLMSR

Commit-ID:  6047550d3d26fed88b18a208b31f8b90b5ef3e9b
Gitweb:     http://git.kernel.org/tip/6047550d3d26fed88b18a208b31f8b90b5ef3e9b
Author:     Markus Metzger <markus.t.metzger@...el.com>
AuthorDate: Fri, 3 Apr 2009 16:43:49 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 7 Apr 2009 13:36:32 +0200

x86, ds: dont use TIF_DEBUGCTLMSR

Debug store already uses TIF_DS_AREA_MSR to trigger debug store context
switch handling. No need to use TIF_DEBUGCTLMSR, as well.

Signed-off-by: Markus Metzger <markus.t.metzger@...el.com>
Cc: roland@...hat.com
Cc: eranian@...glemail.com
Cc: oleg@...hat.com
Cc: juan.villacis@...el.com
Cc: ak@...ux.jf.intel.com
LKML-Reference: <20090403144604.256645000@...el.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/ds.c |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
index 443f415..cab2832 100644
--- a/arch/x86/kernel/ds.c
+++ b/arch/x86/kernel/ds.c
@@ -925,11 +925,6 @@ static void update_task_debugctlmsr(struct task_struct *task,
 	get_cpu();
 	if (task == current)
 		update_debugctlmsr(debugctlmsr);
-
-	if (task->thread.debugctlmsr)
-		set_tsk_thread_flag(task, TIF_DEBUGCTLMSR);
-	else
-		clear_tsk_thread_flag(task, TIF_DEBUGCTLMSR);
 	put_cpu();
 }
 
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