linux-kernel - Re: [PATCH RT] disable preemption on running show all regs.

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Date:	Tue, 19 Jun 2007 17:36:01 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	RT <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH RT] disable preemption on running show all regs.

On Tue, 2007-06-19 at 13:57 -0700, Daniel Walker wrote:

> Looks like you have a whitespace issue here.. Should be tabs, not
> spaces.


Bah, there's a "/* -*- linux-c -*- " at the top of that file that's
messing up with my emacs!

Is this better :-p

Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

Index: linux-2.6.21.5-rt15/drivers/char/sysrq.c
===================================================================
--- linux-2.6.21.5-rt15.orig/drivers/char/sysrq.c
+++ linux-2.6.21.5-rt15/drivers/char/sysrq.c
@@ -213,7 +213,9 @@ static struct sysrq_key_op sysrq_showreg
 
 static void sysrq_handle_showallregs(int key, struct tty_struct *tty)
 {
+	preempt_disable();
 	nmi_show_all_regs();
+	preempt_enable();
 }
 
 static struct sysrq_key_op sysrq_showallregs_op = {


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