From: Joe Thornber <ejt@xxxxxxxxxx>
Remove dm_cell_release_singleton now that it is unused.
Remove unused @data_block parameter from cell_defer.
Change thin_bio_map to use many returns rather than setting a variable.
Signed-off-by: Joe Thornber <ejt@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
---
drivers/md/dm-bio-prison.c | 25 -------------------------
drivers/md/dm-bio-prison.h | 1 -
drivers/md/dm-thin.c | 26 ++++++++++----------------
3 files changed, 10 insertions(+), 42 deletions(-)
diff --git a/drivers/md/dm-bio-prison.c b/drivers/md/dm-bio-prison.c
index e4e8415..aefb78e 100644
--- a/drivers/md/dm-bio-prison.c
+++ b/drivers/md/dm-bio-prison.c
@@ -208,31 +208,6 @@ void dm_cell_release(struct dm_bio_prison_cell *cell, struct bio_list *bios)
EXPORT_SYMBOL_GPL(dm_cell_release);
/*
- * There are a couple of places where we put a bio into a cell briefly
- * before taking it out again. In these situations we know that no other
- * bio may be in the cell. This function releases the cell, and also does
- * a sanity check.
- */
-static void __cell_release_singleton(struct dm_bio_prison_cell *cell, struct bio *bio)
-{
- BUG_ON(cell->holder != bio);
- BUG_ON(!bio_list_empty(&cell->bios));
-
- __cell_release(cell, NULL);
-}
-
-void dm_cell_release_singleton(struct dm_bio_prison_cell *cell, struct bio *bio)
-{
- unsigned long flags;
- struct dm_bio_prison *prison = cell->prison;
-
- spin_lock_irqsave(&prison->lock, flags);
- __cell_release_singleton(cell, bio);
- spin_unlock_irqrestore(&prison->lock, flags);
-}
-EXPORT_SYMBOL_GPL(dm_cell_release_singleton);
-
-/*
* Sometimes we don't want the holder, just the additional bios.
*/
static void __cell_release_no_holder(struct dm_bio_prison_cell *cell, struct bio_list *inmates)
diff --git a/drivers/md/dm-bio-prison.h b/drivers/md/dm-bio-prison.h
index 4e0ac37..53d1a7a 100644
--- a/drivers/md/dm-bio-prison.h
+++ b/drivers/md/dm-bio-prison.h
@@ -44,7 +44,6 @@ int dm_bio_detain(struct dm_bio_prison *prison, struct dm_cell_key *key,
struct bio *inmate, struct dm_bio_prison_cell **ref);
void dm_cell_release(struct dm_bio_prison_cell *cell, struct bio_list *bios);
-void dm_cell_release_singleton(struct dm_bio_prison_cell *cell, struct bio *bio); // FIXME: bio arg not needed
void dm_cell_release_no_holder(struct dm_bio_prison_cell *cell, struct bio_list *inmates);
void dm_cell_error(struct dm_bio_prison_cell *cell);
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 2772253..db76d19 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -512,8 +512,7 @@ static void overwrite_endio(struct bio *bio, int err)
/*
* This sends the bios in the cell back to the deferred_bios list.
*/
-static void cell_defer(struct thin_c *tc, struct dm_bio_prison_cell *cell,
- dm_block_t data_block)
+static void cell_defer(struct thin_c *tc, struct dm_bio_prison_cell *cell)
{
struct pool *pool = tc->pool;
unsigned long flags;
@@ -586,7 +585,7 @@ static void process_prepared_mapping(struct dm_thin_new_mapping *m)
cell_defer_no_holder(tc, m->cell);
bio_endio(bio, 0);
} else
- cell_defer(tc, m->cell, m->data_block);
+ cell_defer(tc, m->cell);
out:
list_del(&m->list);
@@ -1446,21 +1445,16 @@ static int thin_bio_map(struct dm_target *ti, struct bio *bio,
* provide the hint to load the metadata into cache.
*/
thin_defer_bio(tc, bio);
- r = DM_MAPIO_SUBMITTED;
- break;
-
- default:
- /*
- * Must always call bio_io_error on failure.
- * dm_thin_find_block can fail with -EINVAL if the
- * pool is switched to fail-io mode.
- */
- bio_io_error(bio);
- r = DM_MAPIO_SUBMITTED;
- break;
+ return DM_MAPIO_SUBMITTED;
}
- return r;
+ /*
+ * Must always call bio_io_error on failure.
+ * dm_thin_find_block can fail with -EINVAL if the
+ * pool is switched to fail-io mode.
+ */
+ bio_io_error(bio);
+ return DM_MAPIO_SUBMITTED;
}
static int pool_is_congested(struct dm_target_callbacks *cb, int bdi_bits)
--
1.7.1
--
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