From: Akinobu Mita <akinobu.mita@gmail.com>

I have seen mdadm oops after successfully unloading md module.

This patch privents from unloading md module while
mdadm is polling /proc/mdstat.

Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Akinbou Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/md/md.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN drivers/md/md.c~md-fix-proc-mdstat-refcounting drivers/md/md.c
--- a/drivers/md/md.c~md-fix-proc-mdstat-refcounting
+++ a/drivers/md/md.c
@@ -4912,6 +4912,7 @@ static unsigned int mdstat_poll(struct f
 }
 
 static struct file_operations md_seq_fops = {
+	.owner		= THIS_MODULE,
 	.open           = md_seq_open,
 	.read           = seq_read,
 	.llseek         = seq_lseek,
_