From 4cd1103d8c66b2cdb7e64385c274edb0ac5e8887 Mon Sep 17 00:00:00 2001 From: Joseph Qi Date: Sat, 29 Jan 2022 13:41:23 -0800 Subject: [PATCH] jbd2: export jbd2_journal_[grab|put]_journal_head Patch series "ocfs2: fix a deadlock case". This fixes a deadlock case in ocfs2. We firstly export jbd2 symbols jbd2_journal_[grab|put]_journal_head as preparation and later use them in ocfs2 insread of jbd_[lock|unlock]_bh_journal_head to fix the deadlock. This patch (of 2): This exports symbols jbd2_journal_[grab|put]_journal_head, which will be used outside modules, e.g. ocfs2. Link: https://lkml.kernel.org/r/20220121071205.100648-2-joseph.qi@linux.alibaba.com Signed-off-by: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Gang He Cc: Jun Piao Cc: Andreas Dilger Cc: Gautham Ananthakrishna Cc: Saeed Mirzamohammadi Cc: "Theodore Ts'o" Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/jbd2/journal.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index f13d548e..bf108d4 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2972,6 +2972,7 @@ struct journal_head *jbd2_journal_grab_journal_head(struct buffer_head *bh) jbd_unlock_bh_journal_head(bh); return jh; } +EXPORT_SYMBOL(jbd2_journal_grab_journal_head); static void __journal_remove_journal_head(struct buffer_head *bh) { @@ -3024,6 +3025,7 @@ void jbd2_journal_put_journal_head(struct journal_head *jh) jbd_unlock_bh_journal_head(bh); } } +EXPORT_SYMBOL(jbd2_journal_put_journal_head); /* * Initialize jbd inode head -- 2.7.4