md: avoid use of broken kzalloc mempool
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>
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 89e7681..d2d3fd5 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -150,6 +150,7 @@
}
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 @@
}
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