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.
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