From: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx> Subject: 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@xxxxxxxxxxxxxxxxx Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx> Cc: Mark Fasheh <mark@xxxxxxxxxx> Cc: Joel Becker <jlbec@xxxxxxxxxxxx> Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx> Cc: Changwei Ge <gechangwei@xxxxxxx> Cc: Gang He <ghe@xxxxxxxx> Cc: Jun Piao <piaojun@xxxxxxxxxx> Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx> Cc: Gautham Ananthakrishna <gautham.ananthakrishna@xxxxxxxxxx> Cc: Saeed Mirzamohammadi <saeed.mirzamohammadi@xxxxxxxxxx> Cc: "Theodore Ts'o" <tytso@xxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/jbd2/journal.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/jbd2/journal.c~jbd2-export-jbd2_journal__journal_head +++ a/fs/jbd2/journal.c @@ -2972,6 +2972,7 @@ struct journal_head *jbd2_journal_grab_j 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(struc jbd_unlock_bh_journal_head(bh); } } +EXPORT_SYMBOL(jbd2_journal_put_journal_head); /* * Initialize jbd inode head _
