linux-kernel - Re: [PATCH 20/40] mn10300: Use set_current_blocked() and block

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Message-ID: <1329306598.3675.115.camel@mfleming-mobl1.ger.corp.intel.com>
Date:	Wed, 15 Feb 2012 11:49:58 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	David Howells <dhowells@...hat.com>
Cc:	linux-arch@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	Al Viro <viro@...iv.linux.org.uk>, linux-am33-list@...hat.com
Subject: Re: [PATCH 20/40] mn10300: Use set_current_blocked() and
 block_sigmask()

On Tue, 2012-02-14 at 18:30 +0000, David Howells wrote:
> Matt Fleming <matt@...sole-pimps.org> wrote:
> 
> > > Can this line create a race, now that it's not protected by a lock?  It is
> > > possible for current->blocked to get altered by another thread.
> > 
> > ->blocked can only ever be altered by current, not another thread. See
> > the following comment from sigprocmask() in kernel/signal.c,
> 
> Okay, I've managed to convince myself.  Feel free to my Acked-by to the
> MN10300 and FRV patches.

Thanks! I think Andrew is picking these up, unless you want to take them
through the arch trees?

-- 
Matt Fleming, Intel Open Source Technology Center

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