linux-kernel - Re: [PATCH v2 4/7] signal: sigprocmask: narrow the scope of ->siglock

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Date:	Mon, 25 Apr 2011 13:05:36 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Nikita V. Youshchenko" <nyoushchenko@...sta.com>,
	Matt Fleming <matt@...sole-pimps.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/7] signal: sigprocmask: narrow the scope of
 ->siglock

On Mon, Apr 18, 2011 at 03:45:38PM +0200, Oleg Nesterov wrote:
> No functional changes, preparation to simplify the review of the next change.
> 
> 1. We can read current->block lockless, nobody else can ever change this mask.

                 current->blocked

> 
> 2. Calculate the resulting sigset_t outside of ->siglock into the temporary
>    variable, then take ->siglock and change ->blocked.
> 
> Also, kill the stale comment about BKL.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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