Re: [PATCH] [PATCH] Gaurantee spinlocks implicit barrier for!PREEMPT_COUNT

From: Steven Rostedt
Date: Mon Apr 08 2013 - 10:05:54 EST

On Sun, 2013-04-07 at 21:48 -0700, Linus Torvalds wrote:

> Ingo? Peter? I'm not sure anybody really uses UP+no-preempt on x86,
> but it does seem to be a bug.. Comments?

I believe a lot of people still use no-preempt. Well, at least voluntary
preemption, which would have the same bug.

I'm thinking that we may have just been lucky that gcc didn't move the
get_user() into a place that would cause issues.

Sounds like a bug to me.

-- Steve

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at