md: md_unregister_thread should cope with being passed NULL
authorNeilBrown <neilb@suse.de>
Tue, 31 Mar 2009 03:39:39 +0000 (14:39 +1100)
committerNeilBrown <neilb@suse.de>
Tue, 31 Mar 2009 03:39:39 +0000 (14:39 +1100)
commite0cf8f045b2023b0b3f919ee93eb94345f648434
tree21d8d0741a5ae4676fea5b53939cc806ae2b41bd
parent91adb56473febeeb3ef657bb5147ddd355465700
md: md_unregister_thread should cope with being passed NULL

Mostly md_unregister_thread is only called when we know that the
thread is NULL, but sometimes we need to check first.  It is safer
to put the check inside md_unregister_thread itself.

Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/md.c
drivers/md/raid5.c