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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Johannes Thumshirn <johannes.thumshirn@wdc.com>,
        Filipe Manana <fdmanana@suse.com>,
        David Sterba <dsterba@suse.com>,
        Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH 5.17 008/219] btrfs: remove no longer used counter when reading data page
Date:   Mon, 18 Apr 2022 14:09:37 +0200
Message-Id: <20220418121203.710096473@linuxfoundation.org>
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References: <20220418121203.462784814@linuxfoundation.org>
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From: Filipe Manana <fdmanana@suse.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@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
@@ -3562,7 +3562,6 @@ 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;
@@ -3720,9 +3719,7 @@ 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;