From: Mark Fasheh <mfasheh@xxxxxxxx>
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>
(cherry picked from commit e97fcd95a4778a8caf1980c6c72fdf68185a0838)
---
include/linux/jbd2.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index c7d106e..f366457 100644
--- 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)
--
1.5.6.3
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