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[FOR-STABLE-2.6.27,15/24] jbd2: Add BH_JBDPrivateStart

Message ID 1234886324-15105-16-git-send-email-tytso@mit.edu
State Not Applicable, archived
Headers show

Commit Message

Theodore Ts'o Feb. 17, 2009, 3:58 p.m. UTC 
From: Mark Fasheh <mfasheh@suse.com>

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@mit.edu>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
(cherry picked from commit e97fcd95a4778a8caf1980c6c72fdf68185a0838)
---
 include/linux/jbd2.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
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Patch

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 66c3499..e8e9133 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)