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futex: Take mmap_sem for get_user_pages in fault_in_user_writeable
authorAndi Kleen <andi@firstfloor.org>
Tue, 8 Dec 2009 12:19:42 +0000 (13:19 +0100)
committerThomas Gleixner <tglx@linutronix.de>
Tue, 8 Dec 2009 13:59:36 +0000 (14:59 +0100)
get_user_pages() must be called with mmap_sem held.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: stable@kernel.org
Cc: Andrew Morton <akpm@linuxfoundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Darren Hart <dvhltc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20091208121942.GA21298@basil.fritz.box>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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