[patch 27/36] jbd2: Add BH_JBDPrivateStart

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Mark Fasheh <mfasheh@xxxxxxxx>

(cherry picked from commit e97fcd95a4778a8caf1980c6c72fdf68185a0838)

Add this so that file systems using JBD2 can safely allocate unused b_state
bits.

In this case, we add it so that Ocfs2 can define a single bit for tracking
the validation state of a buffer.

Acked-by: "Theodore Ts'o" <tytso@xxxxxxx>
Signed-off-by: Mark Fasheh <mfasheh@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 include/linux/jbd2.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -329,6 +329,7 @@ enum jbd_state_bits {
 	BH_State,		/* Pins most journal_head state */
 	BH_JournalHead,		/* Pins bh->b_private and jh->b_bh */
 	BH_Unshadow,		/* Dummy bit, for BJ_Shadow wakeup filtering */
+	BH_JBDPrivateStart,	/* First bit available for private use by FS */
 };
 
 BUFFER_FNS(JBD, jbd)

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