From: Mel Gorman <mgorman@suse.de>
Date: Thu, 19 Dec 2013 01:08:45 +0000 (-0800)
Subject: mm: numa: guarantee that tlb_flush_pending updates are visible before page table... 
X-Git-Tag: v3.13-rc5~23^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af2c1401e6f9177483be4fad876d0073669df9df;p=pandora-kernel.git

mm: numa: guarantee that tlb_flush_pending updates are visible before page table updates

According to documentation on barriers, stores issued before a LOCK can
complete after the lock implying that it's possible tlb_flush_pending
can be visible after a page table update.  As per revised documentation,
this patch adds a smp_mb__before_spinlock to guarantee the correct
ordering.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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