linux-kernel - [PATCH 5.15 010/189] btrfs: remove no longer used counter when reading data page

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Date:   Mon, 18 Apr 2022 14:10:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Johannes Thumshirn <johannes.thumshirn@....com>,
        Filipe Manana <fdmanana@...e.com>,
        David Sterba <dsterba@...e.com>,
        Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH 5.15 010/189] btrfs: remove no longer used counter when reading data page

From: Filipe Manana <fdmanana@...e.com>

commit ad3fc7946b1829213bbdbb2b9ad0d124b31ae4a7 upstream.

After commit 92082d40976ed0 ("btrfs: integrate page status update for
data read path into begin/end_page_read"), the 'nr' counter at
btrfs_do_readpage() is no longer used, we increment it but we never
read from it. So just remove it.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@....com>
Signed-off-by: Filipe Manana <fdmanana@...e.com>
Signed-off-by: David Sterba <dsterba@...e.com>
Cc: Nathan Chancellor <nathan@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/btrfs/extent_io.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3561,7 +3561,6 @@ int btrfs_do_readpage(struct page *page,
 	u64 cur_end;
 	struct extent_map *em;
 	int ret = 0;
-	int nr = 0;
 	size_t pg_offset = 0;
 	size_t iosize;
 	size_t blocksize = inode->i_sb->s_blocksize;
@@ -3727,9 +3726,7 @@ int btrfs_do_readpage(struct page *page,
 					 end_bio_extent_readpage, 0,
 					 this_bio_flag,
 					 force_bio_submit);
-		if (!ret) {
-			nr++;
-		} else {
+		if (ret) {
 			unlock_extent(tree, cur, cur + iosize - 1);
 			end_page_read(page, false, cur, iosize);
 			goto out;