md: avoid use of broken kzalloc mempool
authorSage Weil <sage@newdream.net>
Tue, 22 Sep 2009 00:02:55 +0000 (17:02 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 22 Sep 2009 14:17:35 +0000 (07:17 -0700)
The kzalloc mempool does not re-zero items that have been used and then
returned to the pool.  Manually zero the allocated multipath_bh instead.

Acked-by: Neil Brown <neilb@suse.de>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/md/multipath.c

index 89e76819f61f790ebca186d6b64a3d2b023fa5d7..d2d3fd54cc681184cab146bf90ddc000f3b706de 100644 (file)
@@ -150,6 +150,7 @@ static int multipath_make_request (struct request_queue *q, struct bio * bio)
        }
 
        mp_bh = mempool_alloc(conf->pool, GFP_NOIO);
+       memset(mp_bh, 0, sizeof(*mp_bh));
 
        mp_bh->master_bio = bio;
        mp_bh->mddev = mddev;
@@ -493,7 +494,7 @@ static int multipath_run (mddev_t *mddev)
        }
        mddev->degraded = conf->raid_disks - conf->working_disks;
 
-       conf->pool = mempool_create_kzalloc_pool(NR_RESERVED_BUFS,
+       conf->pool = mempool_create_kmalloc_pool(NR_RESERVED_BUFS,
                                                 sizeof(struct multipath_bh));
        if (conf->pool == NULL) {
                printk(KERN_ERR