md: fix /proc/mdstat refcounting

I have seen mdadm oops after successfully unloading md module.

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

Signed-off-by: Akinbou Mita <akinobu.mita@gmail.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0471ebff482ffa4cf4c6df813fb5283c59813bdf..1b1fae8b58b68b2f9168df55351afcdde8da47d9 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4325,6 +4325,7 @@ static unsigned int mdstat_poll(struct file *filp, poll_table *wait)
 }
 
 static struct file_operations md_seq_fops = {
+       .owner          = THIS_MODULE,
        .open           = md_seq_open,
        .read           = seq_read,
        .llseek         = seq_lseek,