[PATCH 3/4] btrfs: remove no longer used function btrfs_extent_readonly()

[fdmanana@kernel.org]

From: Filipe Manana <fdmanana@suse.com>

After the two previous patches:

  btrfs: avoid checking for RO block group twice during nocow writeback
  btrfs: fix race between writes to swap files and scrub

it is no longer used, so just remove it.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
 fs/btrfs/ctree.h       |  1 -
 fs/btrfs/extent-tree.c | 13 -------------
 2 files changed, 14 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 5269777a4fb4..65d158082b86 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2686,7 +2686,6 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
 			 struct btrfs_ref *generic_ref);
 
-int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
 
 /*
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 5476ab84e544..11ef4259cacb 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2455,19 +2455,6 @@ int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 	return __btrfs_mod_ref(trans, root, buf, full_backref, 0);
 }
 
-int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr)
-{
-	struct btrfs_block_group *block_group;
-	int readonly = 0;
-
-	block_group = btrfs_lookup_block_group(fs_info, bytenr);
-	if (!block_group || block_group->ro)
-		readonly = 1;
-	if (block_group)
-		btrfs_put_block_group(block_group);
-	return readonly;
-}
-
 static u64 get_alloc_profile_by_root(struct btrfs_root *root, int data)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
-- 
2.28.0