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dm cache: small cleanups related to deferred prison cell cleanup 

Eliminate __cell_release() since it only had one caller that always
released the cell holder.

Switch cell_error_with_code() to using free_prison_cell() for the sake
of consistency.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2015-08-31 15:41:34 -04:00
parent 9153df7405
commit dc9cee5db5
1 changed files with 6 additions and 15 deletions
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21
drivers/md/dm-cache-target.c
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@ -1063,14 +1063,6 @@ static void dec_io_migrations(struct cache *cache)
atomic_dec(&cache->nr_io_migrations);
}
static void __cell_release(struct cache *cache, struct dm_bio_prison_cell *cell,
bool holder, struct bio_list *bios)
{
(holder ? dm_cell_release : dm_cell_release_no_holder)
(cache->prison, cell, bios);
free_prison_cell(cache, cell);
}
static bool discard_or_flush(struct bio *bio)
{
return bio->bi_rw & (REQ_FLUSH | REQ_FUA | REQ_DISCARD);
@ -1078,14 +1070,13 @@ static bool discard_or_flush(struct bio *bio)
static void __cell_defer(struct cache *cache, struct dm_bio_prison_cell *cell)
{
if (discard_or_flush(cell->holder))
if (discard_or_flush(cell->holder)) {
/*
* We have to handle these bios
* individually.
* We have to handle these bios individually.
*/
__cell_release(cache, cell, true, &cache->deferred_bios);
else
dm_cell_release(cache->prison, cell, &cache->deferred_bios);
free_prison_cell(cache, cell);
} else
list_add_tail(&cell->user_list, &cache->deferred_cells);
}
@ -1112,7 +1103,7 @@ static void cell_defer(struct cache *cache, struct dm_bio_prison_cell *cell, boo
static void cell_error_with_code(struct cache *cache, struct dm_bio_prison_cell *cell, int err)
{
dm_cell_error(cache->prison, cell, err);
dm_bio_prison_free_cell(cache->prison, cell);
free_prison_cell(cache, cell);
}
static void cell_requeue(struct cache *cache, struct dm_bio_prison_cell *cell)