md/raid5: use atomic_dec_return() instead of atomic_dec() and atomic_read().
authormajianpeng <majianpeng@gmail.com>
Tue, 13 Mar 2012 00:21:25 +0000 (11:21 +1100)
committerNeilBrown <neilb@suse.de>
Tue, 13 Mar 2012 00:21:25 +0000 (11:21 +1100)
Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/raid5.c

Simple merge