linux-ext4 - [PATCH] jbd2: modify assert condition in __journal_remove_journal

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Date:   Wed, 22 Jan 2020 02:05:48 -0500
From:   Shijie Luo <luoshijie1@...wei.com>
To:     <linux-ext4@...r.kernel.org>
CC:     <tytso@....edu>, <jack@...e.cz>, <luoshijie1@...wei.com>
Subject: [PATCH] jbd2: modify assert condition in __journal_remove_journal_head

Only when jh->b_jcount = 0 in jbd2_journal_put_journal_head, we are allowed
to call __journal_remove_journal_head.

Signed-off-by: Shijie Luo <luoshijie1@...wei.com>
---
 fs/jbd2/journal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 5e408ee24a1a..4f417a7f1ae0 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2556,7 +2556,7 @@ static void __journal_remove_journal_head(struct buffer_head *bh)
 {
 	struct journal_head *jh = bh2jh(bh);
 
-	J_ASSERT_JH(jh, jh->b_jcount >= 0);
+	J_ASSERT_JH(jh, jh->b_jcount == 0);
 	J_ASSERT_JH(jh, jh->b_transaction == NULL);
 	J_ASSERT_JH(jh, jh->b_next_transaction == NULL);
 	J_ASSERT_JH(jh, jh->b_cp_transaction == NULL);
-- 
2.19.1