From: Guoju Fang <fangguoju@gmail.com>
Date: Wed, 24 Apr 2019 16:48:27 +0000 (+0800)
Subject: bcache: fix inaccurate result of unused buckets
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4e0c04ec3a304490a83d5c0355e64176acc9b4ba;p=linux.git

bcache: fix inaccurate result of unused buckets

To get the amount of unused buckets in sysfs_priority_stats, the code
count the buckets which GC_SECTORS_USED is zero. It's correct and should
not be overwritten by the count of buckets which prio is zero.

Signed-off-by: Guoju Fang <fangguoju@gmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 17bae9c14ca0a..6cd44d3cf906a 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -996,8 +996,6 @@ SHOW(__bch_cache)
 		       !cached[n - 1])
 			--n;
 
-		unused = ca->sb.nbuckets - n;
-
 		while (cached < p + n &&
 		       *cached == BTREE_PRIO)
 			cached++, n--;