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

[Daniel Walker]

On Tue, 2007-06-19 at 16:17 -0400, Steven Rostedt wrote:
> The show all regs sysrq uses the nmi function to do it. But this
> function expects preemption to be off, or funny things happen.
> 
> Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
> 
> Index: linux-2.6.21-rt9/drivers/char/sysrq.c
> ===================================================================
> --- linux-2.6.21-rt9.orig/drivers/char/sysrq.c
> +++ linux-2.6.21-rt9/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();
>  }

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

Daniel

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/