From: Filipe Manana <fdmanana@suse.com>
Date: Thu, 1 Sep 2022 13:18:23 +0000 (+0100)
Subject: btrfs: remove check for impossible block start for an extent map at fiemap
X-Git-Tag: v6.1-rc5~25^2~130
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f12eec9a2665422f4a8e644b4f65475ae2ee5c30;p=platform%2Fkernel%2Flinux-starfive.git

btrfs: remove check for impossible block start for an extent map at fiemap

During fiemap we are testing if an extent map has a block start with a
value of EXTENT_MAP_LAST_BYTE, but that is never set on an extent map,
and never was according to git history. So remove that useless check.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 591c191..b5fa927 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5571,10 +5571,7 @@ int extent_fiemap(struct btrfs_inode *inode, struct fiemap_extent_info *fieinfo,
 		if (off >= max)
 			end = 1;
 
-		if (em->block_start == EXTENT_MAP_LAST_BYTE) {
-			end = 1;
-			flags |= FIEMAP_EXTENT_LAST;
-		} else if (em->block_start == EXTENT_MAP_INLINE) {
+		if (em->block_start == EXTENT_MAP_INLINE) {
 			flags |= (FIEMAP_EXTENT_DATA_INLINE |
 				  FIEMAP_EXTENT_NOT_ALIGNED);
 		} else if (em->block_start == EXTENT_MAP_DELALLOC) {