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Date: Tue, 30 Mar 2010 20:27:12 +0200
From: Frederic Weisbecker <fweisbec@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: LKML <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
       Andrew Morton <akpm@linux-foundation.org>,
       John Kacur <jkacur@redhat.com>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       Al Viro <viro@zeniv.linux.org.uk>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH 5/6] procfs: Push down the bkl from ioctl
Message-ID: <20100330182710.GC5078@nowhere>
References: <1269930015-863-1-git-send-regression-fweisbec@gmail.com> <1269930015-863-6-git-send-regression-fweisbec@gmail.com> <201003301237.28083.arnd@arndb.de>
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On Tue, Mar 30, 2010 at 11:37:27AM +0100, Arnd Bergmann wrote:
> On Tuesday 30 March 2010, Frederic Weisbecker wrote:
> > Push down the bkl from procfs's ioctl main handler to its users.
> > Only three procfs users implement an ioctl (non unlocked) handler.
> > Turn them into unlocked_ioctl and push down the Devil inside.
> 
> Looks good to me. I would have used a single unlock and return statement
> in i8k_ioctl and isdn_divert_ioctl, with goto instead of adding an
> unlock to each return, but it doesn't matter much.


I did that first, but actually that didn't make much difference:

ret = foo;            unlock_kernel()
goto end;      VS     return foo;




> 
> Acked-by: Arnd Bergmann <arnd@arndb.de>


Thanks.