From: Richard Kennedy <richard@rsk.demon.co.uk>
Date: Mon, 24 May 2010 21:32:38 +0000 (-0700)
Subject: fs-writeback: check sync bit earlier in inode_wait_for_writeback
X-Git-Tag: v2.6.35-rc1~364
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58a9d3d8db06ca2ec31f64ec49ab0aeb89971b85;p=pandora-kernel.git

fs-writeback: check sync bit earlier in inode_wait_for_writeback

When wb_writeback() hasn't written anything it will re-acquire the inode
lock before calling inode_wait_for_writeback.

This change tests the sync bit first so that is doesn't need to drop &
re-acquire the lock if the inode became available while wb_writeback() was
waiting to get the lock.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

Reading git-diff-tree failed