linux-kernel - [PATCH 12/13] ext4: remove unnecessary check for avoiding multiple update_backups in ext4_flex_group

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Message-Id: <20230629120044.1261968-13-shikemeng@huaweicloud.com>
Date:   Thu, 29 Jun 2023 20:00:43 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     tytso@....edu, adilger.kernel@...ger.ca
Cc:     linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 12/13] ext4: remove unnecessary check for avoiding multiple update_backups in ext4_flex_group_add

Commit 0acdb8876fead ("ext4: don't call update_backups() multiple times
for the same bg") add check in ext4_flex_group_add to avoid call
update_backups multiple times for block group descriptors in the same
group descriptor block. However, we have already call update_backups in
block step, so the added check is unnecessary.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 fs/ext4/resize.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index da832466ce74..d2b3ee50af31 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1589,7 +1589,6 @@ static int ext4_flex_group_add(struct super_block *sb,
 		int meta_bg = ext4_has_feature_meta_bg(sb);
 		sector_t padding_blocks = meta_bg ? 0 : sbi->s_sbh->b_blocknr -
 					 ext4_group_first_block_no(sb, 0);
-		sector_t old_gdb = 0;
 
 		update_backups(sb, ext4_group_first_block_no(sb, 0),
 			       (char *)es, sizeof(struct ext4_super_block), 0);
@@ -1598,11 +1597,8 @@ static int ext4_flex_group_add(struct super_block *sb,
 
 			gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
 						     gdb_num);
-			if (old_gdb == gdb_bh->b_blocknr)
-				continue;
 			update_backups(sb, gdb_bh->b_blocknr - padding_blocks,
 				       gdb_bh->b_data, gdb_bh->b_size, meta_bg);
-			old_gdb = gdb_bh->b_blocknr;
 		}
 	}
 exit:
-- 
2.30.0