btrfs: unify end_io callbacks of async_submit_bio

The end_io callbacks passed to btrfs_wq_submit_bio
(btrfs_submit_bio_done and btree_submit_bio_done) are effectively the
same code, there's no point to do the indirection. Export
btrfs_submit_bio_done and call it directly.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

4 files changed, 9 insertions, 35 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d82df15af89c..03a7ed448f38 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -108,7 +108,6 @@ struct async_submit_bio {
         void *private_data;
         struct bio *bio;
         extent_submit_bio_start_t *submit_bio_start;
-        extent_submit_bio_done_t *submit_bio_done;
         int mirror_num;
         /*
          * bio_offset is optional, can be used if the pages in the bio
@@ -775,7 +774,7 @@ static void run_one_async_done(struct btrfs_work *work)
                 return;
         }
 
-        async->submit_bio_done(async->private_data, async->bio, async->mirror_num);
+        btrfs_submit_bio_done(async->private_data, async->bio, async->mirror_num);
 }
 
 static void run_one_async_free(struct btrfs_work *work)
@@ -789,8 +788,7 @@ static void run_one_async_free(struct btrfs_work *work)
 blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
                                  int mirror_num, unsigned long bio_flags,
                                  u64 bio_offset, void *private_data,
-                                 extent_submit_bio_start_t *submit_bio_start,
-                                 extent_submit_bio_done_t *submit_bio_done)
+                                 extent_submit_bio_start_t *submit_bio_start)
 {
         struct async_submit_bio *async;
 
@@ -802,7 +800,6 @@ blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
         async->bio = bio;
         async->mirror_num = mirror_num;
         async->submit_bio_start = submit_bio_start;
-        async->submit_bio_done = submit_bio_done;
 
         btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start,
                         run_one_async_done, run_one_async_free);
@@ -845,24 +842,6 @@ static blk_status_t btree_submit_bio_start(void *private_data, struct bio *bio,
         return btree_csum_one_bio(bio);
 }
 
-static blk_status_t btree_submit_bio_done(void *private_data, struct bio *bio,
-                                            int mirror_num)
-{
-        struct inode *inode = private_data;
-        blk_status_t ret;
-
-        /*
-         * when we're called for a write, we're already in the async
-         * submission context.  Just jump into btrfs_map_bio
-         */
-        ret = btrfs_map_bio(btrfs_sb(inode->i_sb), bio, mirror_num, 1);
-        if (ret) {
-                bio->bi_status = ret;
-                bio_endio(bio);
-        }
-        return ret;
-}
-
 static int check_async_write(struct btrfs_inode *bi)
 {
         if (atomic_read(&bi->sync_writers))
@@ -905,8 +884,7 @@ static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio,
                  */
                 ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0,
                                           bio_offset, private_data,
-                                          btree_submit_bio_start,
-                                          btree_submit_bio_done);
+                                          btree_submit_bio_start);
         }
 
         if (ret)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 1a3d277b027b..4cccba22640f 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -120,8 +120,9 @@ blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
 blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
                         int mirror_num, unsigned long bio_flags,
                         u64 bio_offset, void *private_data,
-                        extent_submit_bio_start_t *submit_bio_start,
-                        extent_submit_bio_done_t *submit_bio_done);
+                        extent_submit_bio_start_t *submit_bio_start);
+blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
+                          int mirror_num);
 int btrfs_write_tree_block(struct extent_buffer *buf);
 void btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
 int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 0ecc13b7d6f7..4e6d34dd7caf 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -92,9 +92,6 @@ typedef	blk_status_t (extent_submit_bio_hook_t)(void *private_data, struct bio *
 typedef blk_status_t (extent_submit_bio_start_t)(void *private_data,
                 struct bio *bio, u64 bio_offset);
 
-typedef blk_status_t (extent_submit_bio_done_t)(void *private_data,
-                struct bio *bio, int mirror_num);
-
 struct extent_io_ops {
         /*
          * The following callbacks must be allways defined, the function
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 564ec00c765b..6cb42e33fdc3 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1957,7 +1957,7 @@ static blk_status_t btrfs_submit_bio_start(void *private_data, struct bio *bio,
  * At IO completion time the cums attached on the ordered extent record
  * are inserted into the btree
  */
-static blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
+blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
                           int mirror_num)
 {
         struct inode *inode = private_data;
@@ -2030,8 +2030,7 @@ static blk_status_t btrfs_submit_bio_hook(void *private_data, struct bio *bio,
                 /* we're doing a write, do the async checksumming */
                 ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, bio_flags,
                                           bio_offset, inode,
-                                          btrfs_submit_bio_start,
-                                          btrfs_submit_bio_done);
+                                          btrfs_submit_bio_start);
                 goto out;
         } else if (!skip_sum) {
                 ret = btrfs_csum_one_bio(inode, bio, 0, 0);
@@ -8295,8 +8294,7 @@ static inline blk_status_t btrfs_submit_dio_bio(struct bio *bio,
         if (write && async_submit) {
                 ret = btrfs_wq_submit_bio(fs_info, bio, 0, 0,
                                           file_offset, inode,
-                                          btrfs_submit_bio_start_direct_io,
-                                          btrfs_submit_bio_done);
+                                          btrfs_submit_bio_start_direct_io);
                 goto err;
         } else if (write) {
                 /*