[PATCH v4 02/12] btrfs: extent_io: Kill the forward declaration of flush_write_bio()

[Qu Wenruo]

There is no need to forward declare flush_write_bio(), as it only
depends on submit_one_bio().

Both of them are pretty small, just move them to kill the forward
declaration.

Signed-off-by: Qu Wenruo <w...@suse.com>
Reviewed-by: Nikolay Borisov <nbori...@suse.com>
Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de>
---
 fs/btrfs/extent_io.c | 66 +++++++++++++++++++++-----------------------
 1 file changed, 32 insertions(+), 34 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 52abe4082680..8a2335713a2d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -147,7 +147,38 @@ static int add_extent_changeset(struct extent_state 
*state, unsigned bits,
        return ret;
 }
 
-static void flush_write_bio(struct extent_page_data *epd);
+static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
+                                      unsigned long bio_flags)
+{
+       blk_status_t ret = 0;
+       struct bio_vec *bvec = bio_last_bvec_all(bio);
+       struct page *page = bvec->bv_page;
+       struct extent_io_tree *tree = bio->bi_private;
+       u64 start;
+
+       start = page_offset(page) + bvec->bv_offset;
+
+       bio->bi_private = NULL;
+
+       if (tree->ops)
+               ret = tree->ops->submit_bio_hook(tree->private_data, bio,
+                                          mirror_num, bio_flags, start);
+       else
+               btrfsic_submit_bio(bio);
+
+       return blk_status_to_errno(ret);
+}
+
+static void flush_write_bio(struct extent_page_data *epd)
+{
+       if (epd->bio) {
+               int ret;
+
+               ret = submit_one_bio(epd->bio, 0, 0);
+               BUG_ON(ret < 0); /* -ENOMEM */
+               epd->bio = NULL;
+       }
+}
 
 int __init extent_io_init(void)
 {
@@ -2692,28 +2723,6 @@ struct bio *btrfs_bio_clone_partial(struct bio *orig, 
int offset, int size)
        return bio;
 }
 
-static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
-                                      unsigned long bio_flags)
-{
-       blk_status_t ret = 0;
-       struct bio_vec *bvec = bio_last_bvec_all(bio);
-       struct page *page = bvec->bv_page;
-       struct extent_io_tree *tree = bio->bi_private;
-       u64 start;
-
-       start = page_offset(page) + bvec->bv_offset;
-
-       bio->bi_private = NULL;
-
-       if (tree->ops)
-               ret = tree->ops->submit_bio_hook(tree->private_data, bio,
-                                          mirror_num, bio_flags, start);
-       else
-               btrfsic_submit_bio(bio);
-
-       return blk_status_to_errno(ret);
-}
-
 /*
  * @opf:       bio REQ_OP_* and REQ_* flags as one value
  * @tree:      tree so we can call our merge_bio hook
@@ -4007,17 +4016,6 @@ static int extent_write_cache_pages(struct address_space 
*mapping,
        return ret;
 }
 
-static void flush_write_bio(struct extent_page_data *epd)
-{
-       if (epd->bio) {
-               int ret;
-
-               ret = submit_one_bio(epd->bio, 0, 0);
-               BUG_ON(ret < 0); /* -ENOMEM */
-               epd->bio = NULL;
-       }
-}
-
 int extent_write_full_page(struct page *page, struct writeback_control *wbc)
 {
        int ret;
-- 
2.20.1