linux-kernel - [PATCH] btrfs: remove unused pages

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Date:   Mon, 24 Jul 2023 14:19:15 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>
Cc:     Arnd Bergmann <arnd@...db.de>, kernel test robot <lkp@...el.com>,
        Johannes Thumshirn <johannes.thumshirn@....com>,
        Qu Wenruo <wqu@...e.com>, Anand Jain <anand.jain@...cle.com>,
        Filipe Manana <fdmanana@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] btrfs: remove unused pages_processed variable

From: Arnd Bergmann <arnd@...db.de>

The only user of pages_processed was removed, so it's now a local write-only
variable that can be eliminated as well:

fs/btrfs/extent_io.c:214:16: error: variable 'pages_processed' set but not used [-Werror,-Wunused-but-set-variable]

Fixes: 9480af8687200 ("btrfs: split page locking out of __process_pages_contig")
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307241541.8w52nEnt-lkp@intel.com/
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 fs/btrfs/extent_io.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c0440a0988c9a..121edea2cfe85 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -211,7 +211,6 @@ static void __process_pages_contig(struct address_space *mapping,
 	pgoff_t start_index = start >> PAGE_SHIFT;
 	pgoff_t end_index = end >> PAGE_SHIFT;
 	pgoff_t index = start_index;
-	unsigned long pages_processed = 0;
 	struct folio_batch fbatch;
 	int i;
 
@@ -226,7 +225,6 @@ static void __process_pages_contig(struct address_space *mapping,
 
 			process_one_page(fs_info, &folio->page, locked_page,
 					 page_ops, start, end);
-			pages_processed += folio_nr_pages(folio);
 		}
 		folio_batch_release(&fbatch);
 		cond_resched();
-- 
2.39.2