diff mbox series

[08/19] dm-thin: use blkdev_issue_flush instead of open coding it

Message ID 20220124091107.642561-9-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/19] fs: remove mpage_alloc | expand

Commit Message

Christoph Hellwig Jan. 24, 2022, 9:10 a.m. UTC 
Use blkdev_issue_flush, which uses an on-stack bio instead of an
opencoded version with a bio embedded into struct pool.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/dm-thin.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

Comments

Mike Snitzer Jan. 27, 2022, 5:11 p.m. UTC | #1 
On Mon, Jan 24 2022 at  4:10P -0500,
Christoph Hellwig <hch@lst.de> wrote:

> Use blkdev_issue_flush, which uses an on-stack bio instead of an
> opencoded version with a bio embedded into struct pool.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Acked-by: Mike Snitzer <snitzer@redhat.com>
diff mbox series

Patch

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 76a9c2e9aeeea..411a3f56ed90c 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -282,8 +282,6 @@  struct pool {
 	struct dm_bio_prison_cell **cell_sort_array;
 
 	mempool_t mapping_pool;
-
-	struct bio flush_bio;
 };
 
 static void metadata_operation_failed(struct pool *pool, const char *op, int r);
@@ -2906,7 +2904,6 @@  static void __pool_destroy(struct pool *pool)
 	if (pool->next_mapping)
 		mempool_free(pool->next_mapping, &pool->mapping_pool);
 	mempool_exit(&pool->mapping_pool);
-	bio_uninit(&pool->flush_bio);
 	dm_deferred_set_destroy(pool->shared_read_ds);
 	dm_deferred_set_destroy(pool->all_io_ds);
 	kfree(pool);
@@ -2987,7 +2984,6 @@  static struct pool *pool_create(struct mapped_device *pool_md,
 	pool->low_water_triggered = false;
 	pool->suspended = true;
 	pool->out_of_data_space = false;
-	bio_init(&pool->flush_bio, NULL, 0);
 
 	pool->shared_read_ds = dm_deferred_set_create();
 	if (!pool->shared_read_ds) {
@@ -3194,13 +3190,8 @@  static void metadata_low_callback(void *context)
 static int metadata_pre_commit_callback(void *context)
 {
 	struct pool *pool = context;
-	struct bio *flush_bio = &pool->flush_bio;
-
-	bio_reset(flush_bio);
-	bio_set_dev(flush_bio, pool->data_dev);
-	flush_bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
 
-	return submit_bio_wait(flush_bio);
+	return blkdev_issue_flush(pool->data_dev);
 }
 
 static sector_t get_dev_size(struct block_device *bdev)