linux-ext4 - [PATCH 1/2] jbd2: Remove wrong sb->s

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Message-ID: <20250206094657.20865-3-jack@suse.cz>
Date: Thu,  6 Feb 2025 10:46:58 +0100
From: Jan Kara <jack@...e.cz>
To: Ted Tso <tytso@....edu>
Cc: <linux-ext4@...r.kernel.org>,
	Jan Kara <jack@...e.cz>,
	stable@...r.kernel.org
Subject: [PATCH 1/2] jbd2: Remove wrong sb->s_sequence check

Journal emptiness is not determined by sb->s_sequence == 0 but rather by
sb->s_start == 0 (which is set a few lines above). Furthermore 0 is a
valid transaction ID so the check can spuriously trigger. Remove the
invalid WARN_ON.

CC: stable@...r.kernel.org
Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/jbd2/journal.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 7e49d912b091..354c9f691df3 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1879,7 +1879,6 @@ int jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
 
 	/* Log is no longer empty */
 	write_lock(&journal->j_state_lock);
-	WARN_ON(!sb->s_sequence);
 	journal->j_flags &= ~JBD2_FLUSHED;
 	write_unlock(&journal->j_state_lock);
 
-- 
2.43.0