[PATCH] jbd2: Silence warnings about non-uptodate buffers

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When underlying block device becomes unavailable (e.g. someone pulling an
USB stick from under us), kernel produces warning about non-uptodate buffer
(superblock) being marked dirty. Silence these warnings by making buffer
uptodate before marking it dirty.

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 fs/jbd2/journal.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 2e24567..55de8f7 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1261,6 +1261,7 @@ void jbd2_journal_update_superblock(journal_t *journal, int wait)
 	spin_unlock(&journal->j_state_lock);
 
 	BUFFER_TRACE(bh, "marking dirty");
+	set_buffer_uptodate(bh);
 	mark_buffer_dirty(bh);
 	if (wait)
 		sync_dirty_buffer(bh);
-- 
1.5.2.4

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