This patch reaaranges inode_lock taking in writeback_inodes().  It narrows
down use of inode_lock and removes unneccassary nesting of sb_lock and
inode_lock.  Instead of holding inode_lock for all the time I moved it
around sync_sb_inodes() as it is in all other places.
Signed-Off-By: Kirill Korotaev <dev@sw.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>