From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 11 Feb 2009 17:10:10 +0000 (+0100)
Subject: futex: fix reference leak
X-Git-Tag: v2.6.29-rc6~75^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2fff78c784ed97a8e5aa225ef5228f0a6d862d82;p=pandora-kernel.git

futex: fix reference leak

Catalin noticed that (38d47c1b7075: futex: rely on get_user_pages() for
shared futexes) caused an mm_struct leak.

Some tracing with the function graph tracer quickly pointed out that
futex_wait() has exit paths with unbalanced reference counts.

This regression was discovered by kmemleak.

Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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