From: Chris Mason <chris.mason@oracle.com>
Date: Fri, 3 Apr 2009 14:14:18 +0000 (-0400)
Subject: Btrfs: Optimize locking in btrfs_next_leaf()
X-Git-Tag: v2.6.30-rc1~222^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8e73f275011b3264a87339fd9f1690e944e381c9;p=pandora-kernel.git

Btrfs: Optimize locking in btrfs_next_leaf()

btrfs_next_leaf was using blocking locks when it could have been using
faster spinning ones instead.  This adds a few extra checks around
the pieces that block and switches over to spinning locks.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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