btrfs: open code set_extent_delalloc

The helper is used once in fs code and a few times in the self test
code.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-io-tree.h

@@ -193,15 +193,6 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 		       u32 bits, u32 clear_bits,
 		       struct extent_state **cached_state);
 
-static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
-				      u64 end, u32 extra_bits,
-				      struct extent_state **cached_state)
-{
-	return set_extent_bit(tree, start, end,
-			      EXTENT_DELALLOC | extra_bits,
-			      cached_state, GFP_NOFS);
-}
-
 static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
 		u64 end)
 {

fs/btrfs/inode.c

@@ -2922,8 +2922,8 @@ int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
 			return ret;
 	}
 
-	return set_extent_delalloc(&inode->io_tree, start, end, extra_bits,
-				   cached_state);
+	return set_extent_bit(&inode->io_tree, start, end,
+			      EXTENT_DELALLOC | extra_bits, cached_state, GFP_NOFS);
 }
 
 /* see btrfs_writepage_start_hook for details on why this is required */

fs/btrfs/tests/extent-io-tests.c

@@ -159,7 +159,7 @@ static int test_find_delalloc(u32 sectorsize)
 	 * |--- delalloc ---|
 	 * |---  search  ---|
 	 */
-	set_extent_delalloc(tmp, 0, sectorsize - 1, 0, NULL);
+	set_extent_bit(tmp, 0, sectorsize - 1, EXTENT_DELALLOC, NULL, GFP_NOFS);
 	start = 0;
 	end = start + PAGE_SIZE - 1;
 	found = find_lock_delalloc_range(inode, locked_page, &start,
@@ -190,7 +190,7 @@ static int test_find_delalloc(u32 sectorsize)
 		test_err("couldn't find the locked page");
 		goto out_bits;
 	}
-	set_extent_delalloc(tmp, sectorsize, max_bytes - 1, 0, NULL);
+	set_extent_bit(tmp, sectorsize, max_bytes - 1, EXTENT_DELALLOC, NULL, GFP_NOFS);
 	start = test_start;
 	end = start + PAGE_SIZE - 1;
 	found = find_lock_delalloc_range(inode, locked_page, &start,
@@ -245,7 +245,7 @@ static int test_find_delalloc(u32 sectorsize)
 	 *
 	 * We are re-using our test_start from above since it works out well.
 	 */
-	set_extent_delalloc(tmp, max_bytes, total_dirty - 1, 0, NULL);
+	set_extent_bit(tmp, max_bytes, total_dirty - 1, EXTENT_DELALLOC, NULL, GFP_NOFS);
 	start = test_start;
 	end = start + PAGE_SIZE - 1;
 	found = find_lock_delalloc_range(inode, locked_page, &start,