btrfs: simplify ->flush_bio handling
Use and embedded bios that is initialized when used instead of
bio_kmalloc plus bio_reset.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220406061228.410163-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index bd297f2..628c9af 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -121,8 +121,8 @@ struct btrfs_device {
/* bytes used on the current transaction */
u64 commit_bytes_used;
- /* for sending down flush barriers */
- struct bio *flush_bio;
+ /* Bio used for flushing device barriers */
+ struct bio flush_bio;
struct completion flush_wait;
/* per-device scrub information */
