From: Michel Lespinasse <walken@google.com>
Date: Tue, 20 Jul 2010 22:19:45 +0000 (-0700)
Subject: x86, rwsem: Stay on fast path when count > 0 in __up_write()
X-Git-Tag: v2.6.36-rc1~523^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a751bd858b16dce57f3b6b85ba07946df1bd7be4;p=pandora-kernel.git

x86, rwsem: Stay on fast path when count > 0 in __up_write()

When count > 0 there is no need to take the call_rwsem_wake path.  If
we did take that path, it would just return without doing anything due
to the active count not being zero.

Signed-off-by: Michel Lespinasse <walken@google.com>
LKML-Reference: <201007202219.o6KMJj9x021042@imap1.linux-foundation.org>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Mike Waychison <mikew@google.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---

Reading git-diff-tree failed