diff options
| author | Joe Thornber <ejt@redhat.com> | 2013-10-24 14:10:28 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2013-11-09 18:20:17 -0500 |
| commit | 0184b44e321dda893d4d4be33499d404718c3a86 (patch) | |
| tree | 064e79ebdb9e19c8f07617e80a810a9603506323 /drivers | |
| parent | 3351937e4a6054a925d306e36c4cddc7723b1579 (diff) | |
| download | linux-0184b44e321dda893d4d4be33499d404718c3a86.tar.bz2 | |
dm cache policy mq: a few small fixes
Rename takeout_queue to concat_queue.
Fix a harmless bug in mq policies pop() function. Currently pop()
always succeeds, with up coming changes this wont be the case.
Fix typo in comment above pre_cache_to_cache prototype.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-cache-policy-mq.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/md/dm-cache-policy-mq.c b/drivers/md/dm-cache-policy-mq.c index db490f74c7f8..a9a25de5b011 100644 --- a/drivers/md/dm-cache-policy-mq.c +++ b/drivers/md/dm-cache-policy-mq.c @@ -311,7 +311,7 @@ struct mq_policy { /*----------------------------------------------------------------*/ /* Free/alloc mq cache entry structures. */ -static void takeout_queue(struct list_head *lh, struct queue *q) +static void concat_queue(struct list_head *lh, struct queue *q) { unsigned level; @@ -323,8 +323,8 @@ static void free_entries(struct mq_policy *mq) { struct entry *e, *tmp; - takeout_queue(&mq->free, &mq->pre_cache); - takeout_queue(&mq->free, &mq->cache); + concat_queue(&mq->free, &mq->pre_cache); + concat_queue(&mq->free, &mq->cache); list_for_each_entry_safe(e, tmp, &mq->free, list) kmem_cache_free(mq_entry_cache, e); @@ -531,14 +531,16 @@ static void del(struct mq_policy *mq, struct entry *e) */ static struct entry *pop(struct mq_policy *mq, struct queue *q) { - struct entry *e = container_of(queue_pop(q), struct entry, list); + struct entry *e; + struct list_head *h = queue_pop(q); - if (e) { - hash_remove(e); + if (!h) + return NULL; - if (e->in_cache) - free_cblock(mq, e->cblock); - } + e = container_of(h, struct entry, list); + hash_remove(e); + if (e->in_cache) + free_cblock(mq, e->cblock); return e; } @@ -697,7 +699,7 @@ static int cache_entry_found(struct mq_policy *mq, } /* - * Moves and entry from the pre_cache to the cache. The main work is + * Moves an entry from the pre_cache to the cache. The main work is * finding which cache block to use. */ static int pre_cache_to_cache(struct mq_policy *mq, struct entry *e, |