bcache: add a comment in super.c

This patch adds a line of code comment in super.c:register_bdev(), to
make code to be more comprehensible.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index c7ffa6ef3f8276a0c4d1d15644d1a43b35dcb9ef..1e85cbb4c159f5073d87f25cbde4f0c6e59574c6 100644 (file)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1291,6 +1291,7 @@ static void register_bdev(struct cache_sb *sb, struct page *sb_page,
        pr_info("registered backing device %s", dc->backing_dev_name);
 
        list_add(&dc->list, &uncached_devices);
+       /* attach to a matched cache set if it exists */
        list_for_each_entry(c, &bch_cache_sets, list)
                bch_cached_dev_attach(dc, c, NULL);