Re: [Kgdb-bugreport] [PATCH 4/5] kgdb: Use atomic operators whichusebarriers

[Linus Torvalds]

On Fri, 2 Apr 2010, Jason Wessel wrote:
> 
> Here is the revised patch, which is going into the kgdb-fixes branch.

Yeah, this patch I have no issues with.

Except:

> From: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
> Subject: [PATCH] kgdb: Use atomic operators which use barriers
> 
> The cpu_relax() does not mandate that there is an smp memory barrier.
> As a result on the arm smp architecture the kernel debugger can hang
> on entry from time to time, as shown by the kgdb regression tests.

Now your changelog makes no sense any more.

		Linus
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