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authorColy Li <colyli@suse.de>2019-11-13 16:03:20 +0800
committerJens Axboe <axboe@kernel.dk>2019-11-13 15:42:50 -0700
commit06c1526da97dd0022973de3fc41b79b2d431b435 (patch)
treeb965276c7b36e454d278d1fe4af3dca060237201
parent41fa4deef90ba1cd048b740317f50b9decae9fc8 (diff)
bcache: add code comment bch_keylist_pop() and bch_keylist_pop_front()
This patch adds simple code comments for bch_keylist_pop() and bch_keylist_pop_front() in bset.c, to make the code more easier to be understand. Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--drivers/md/bcache/bset.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index 08768796b543..f37a429f093d 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -155,6 +155,7 @@ int __bch_keylist_realloc(struct keylist *l, unsigned int u64s)
return 0;
}
+/* Pop the top key of keylist by pointing l->top to its previous key */
struct bkey *bch_keylist_pop(struct keylist *l)
{
struct bkey *k = l->keys;
@@ -168,6 +169,7 @@ struct bkey *bch_keylist_pop(struct keylist *l)
return l->top = k;
}
+/* Pop the bottom key of keylist and update l->top_p */
void bch_keylist_pop_front(struct keylist *l)
{
l->top_p -= bkey_u64s(l->keys);