block: fix compiler warning in genhd.c

Warn if something really bad happens if we can't create this link.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/block/genhd.c b/block/genhd.c
index 24e3fc9095fe..3ccf5c017565 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -183,6 +183,7 @@ static int exact_lock(dev_t devt, void *data)
 void add_disk(struct gendisk *disk)
 {
         struct backing_dev_info *bdi;
+        int retval;
 
         disk->flags |= GENHD_FL_UP;
         blk_register_region(MKDEV(disk->major, disk->first_minor),
@@ -193,7 +194,8 @@ void add_disk(struct gendisk *disk)
 
         bdi = &disk->queue->backing_dev_info;
         bdi_register_dev(bdi, MKDEV(disk->major, disk->first_minor));
-        sysfs_create_link(&disk->dev.kobj, &bdi->dev->kobj, "bdi");
+        retval = sysfs_create_link(&disk->dev.kobj, &bdi->dev->kobj, "bdi");
+        WARN_ON(retval);
 }
 
 EXPORT_SYMBOL(add_disk);