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dm thin: rename cell_defer_except to cell_defer_no_holder 

Rename cell_defer_except() to cell_defer_no_holder() which describes
its function more clearly.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Joe Thornber 2012-12-21 20:23:33 +00:00 committed by Alasdair G Kergon
parent 9aa0c0e60f
commit f286ba0eed
1 changed files with 21 additions and 21 deletions
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42
drivers/md/dm-thin.c
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@ -526,7 +526,7 @@ static void cell_defer(struct thin_c *tc, struct dm_bio_prison_cell *cell,
/*
* Same as cell_defer except it omits the original holder of the cell.
*/
static void cell_defer_except(struct thin_c *tc, struct dm_bio_prison_cell *cell)
static void cell_defer_no_holder(struct thin_c *tc, struct dm_bio_prison_cell *cell)
{
struct bio_list bios;
struct pool *pool = tc->pool;
@ -583,7 +583,7 @@ static void process_prepared_mapping(struct dm_thin_new_mapping *m)
* the bios in the cell.
*/
if (bio) {
cell_defer_except(tc, m->cell);
cell_defer_no_holder(tc, m->cell);
bio_endio(bio, 0);
} else
cell_defer(tc, m->cell, m->data_block);
@ -598,8 +598,8 @@ static void process_prepared_discard_fail(struct dm_thin_new_mapping *m)
struct thin_c *tc = m->tc;
bio_io_error(m->bio);
cell_defer_except(tc, m->cell);
cell_defer_except(tc, m->cell2);
cell_defer_no_holder(tc, m->cell);
cell_defer_no_holder(tc, m->cell2);
mempool_free(m, tc->pool->mapping_pool);
}
@ -608,8 +608,8 @@ static void process_prepared_discard_passdown(struct dm_thin_new_mapping *m)
struct thin_c *tc = m->tc;
inc_all_io_entry(tc->pool, m->bio);
cell_defer_except(tc, m->cell);
cell_defer_except(tc, m->cell2);
cell_defer_no_holder(tc, m->cell);
cell_defer_no_holder(tc, m->cell2);
if (m->pass_discard)
remap_and_issue(tc, m->bio, m->data_block);
@ -950,7 +950,7 @@ static void process_discard(struct thin_c *tc, struct bio *bio)
*/
build_data_key(tc->td, lookup_result.block, &key2);
if (dm_bio_detain(tc->pool->prison, &key2, bio, &cell2)) {
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
break;
}
@ -977,8 +977,8 @@ static void process_discard(struct thin_c *tc, struct bio *bio)
}
} else {
inc_all_io_entry(pool, bio);
cell_defer_except(tc, cell);
cell_defer_except(tc, cell2);
cell_defer_no_holder(tc, cell);
cell_defer_no_holder(tc, cell2);
/*
* The DM core makes sure that the discard doesn't span
@ -996,13 +996,13 @@ static void process_discard(struct thin_c *tc, struct bio *bio)
/*
* It isn't provisioned, just forget it.
*/
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
bio_endio(bio, 0);
break;
default:
DMERR("discard: find block unexpectedly returned %d", r);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
bio_io_error(bio);
break;
}
@ -1057,7 +1057,7 @@ static void process_shared_bio(struct thin_c *tc, struct bio *bio,
h->shared_read_entry = dm_deferred_entry_inc(pool->shared_read_ds);
inc_all_io_entry(pool, bio);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
remap_and_issue(tc, bio, lookup_result->block);
}
@ -1074,7 +1074,7 @@ static void provision_block(struct thin_c *tc, struct bio *bio, dm_block_t block
*/
if (!bio->bi_size) {
inc_all_io_entry(tc->pool, bio);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
remap_and_issue(tc, bio, 0);
return;
@ -1085,7 +1085,7 @@ static void provision_block(struct thin_c *tc, struct bio *bio, dm_block_t block
*/
if (bio_data_dir(bio) == READ) {
zero_fill_bio(bio);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
bio_endio(bio, 0);
return;
}
@ -1132,10 +1132,10 @@ static void process_bio(struct thin_c *tc, struct bio *bio)
case 0:
if (lookup_result.shared) {
process_shared_bio(tc, bio, block, &lookup_result);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
} else {
inc_all_io_entry(tc->pool, bio);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
remap_and_issue(tc, bio, lookup_result.block);
}
@ -1144,7 +1144,7 @@ static void process_bio(struct thin_c *tc, struct bio *bio)
case -ENODATA:
if (bio_data_dir(bio) == READ && tc->origin_dev) {
inc_all_io_entry(tc->pool, bio);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
remap_to_origin_and_issue(tc, bio);
} else
@ -1153,7 +1153,7 @@ static void process_bio(struct thin_c *tc, struct bio *bio)
default:
DMERR("dm_thin_find_block() failed, error = %d", r);
cell_defer_except(tc, cell);
cell_defer_no_holder(tc, cell);
bio_io_error(bio);
break;
}
@ -1429,13 +1429,13 @@ static int thin_bio_map(struct dm_target *ti, struct bio *bio,
build_data_key(tc->td, result.block, &key);
if (dm_bio_detain(tc->pool->prison, &key, bio, &cell2)) {
cell_defer_except(tc, cell1);
cell_defer_no_holder(tc, cell1);
return DM_MAPIO_SUBMITTED;
}
inc_all_io_entry(tc->pool, bio);
cell_defer_except(tc, cell2);
cell_defer_except(tc, cell1);
cell_defer_no_holder(tc, cell2);
cell_defer_no_holder(tc, cell1);
remap(tc, bio, result.block);
return DM_MAPIO_REMAPPED;