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

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Message-ID: <28189.1329244210@redhat.com>
Date:	Tue, 14 Feb 2012 18:30:10 +0000
From:	David Howells <dhowells@...hat.com>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	dhowells@...hat.com, 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()


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.

David
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