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From:   Zhang Yi <yi.zhang@huaweicloud.com>
To:     linux-ext4@vger.kernel.org
Cc:     tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz,
        yi.zhang@huawei.com, yi.zhang@huaweicloud.com, yukuai3@huawei.com
Subject: [PATCH v2 03/12] jbd2: don't load superblock in jbd2_journal_check_used_features()
Date:   Thu, 10 Aug 2023 16:54:08 +0800
Message-Id: <20230810085417.1501293-4-yi.zhang@huaweicloud.com>
In-Reply-To: <20230810085417.1501293-1-yi.zhang@huaweicloud.com>
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From: Zhang Yi <yi.zhang@huawei.com>

Since load_superblock() has been moved to journal_init_common(), the
in-memory superblock structure is initialized and contains valid data
once the file system has a journal_t object, so it's safe to access it,
let's drop the call to journal_get_superblock() from
jbd2_journal_check_used_features() and also drop the setting/clearing of
the veirfy bit of the superblock buffer.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
---
 fs/jbd2/journal.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index b247d374e7a6..c7cdb434966f 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1361,8 +1361,6 @@ static int journal_get_superblock(journal_t *journal)
 	bh = journal->j_sb_buffer;
 
 	J_ASSERT(bh != NULL);
-	if (buffer_verified(bh))
-		return 0;
 
 	err = bh_read(bh, 0);
 	if (err < 0) {
@@ -1437,7 +1435,6 @@ static int journal_get_superblock(journal_t *journal)
 			goto out;
 		}
 	}
-	set_buffer_verified(bh);
 	return 0;
 
 out:
@@ -2224,8 +2221,6 @@ int jbd2_journal_check_used_features(journal_t *journal, unsigned long compat,
 
 	if (!compat && !ro && !incompat)
 		return 1;
-	if (journal_get_superblock(journal))
-		return 0;
 	if (!jbd2_format_support_feature(journal))
 		return 0;
 
-- 
2.34.3