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>

diff --git a/block/genhd.c b/block/genhd.c
index 24e3fc9095fe454439c3108e0eae0a1d8e9a8b50..3ccf5c01756542db4fdb63a3005f9a25bc8e5c5f 100644 (file)
--- 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);