linux-kernel - Re: [PATCH -tip] x86/mce: Use atomic_inc_return barrier when starting monad sync

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Message-ID: <20160323083011.GD6614@pd.tnic>
Date:	Wed, 23 Mar 2016 09:30:11 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Davidlohr Bueso <dave@...olabs.net>
Cc:	tony.luck@...el.com, mingo@...nel.org,
	linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH -tip] x86/mce: Use atomic_inc_return barrier when
 starting monad sync

On Mon, Mar 21, 2016 at 04:19:56PM -0700, Davidlohr Bueso wrote:
> mce_start() has an explicit smp_wmb to serialize writes to
> global_nwo and mce_callin. However, atomic_inc_return() implies
> barriers on both sides of the call, as such simply rely on this
> full smp barrier.
> 
> Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
> ---
>  arch/x86/kernel/cpu/mcheck/mce.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

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