linux-ext4 - [PATCH] jbd2: Add BH

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Date:	Tue, 18 Nov 2008 17:45:36 -0800
From:	Mark Fasheh <mfasheh@...e.com>
To:	linux-ext4@...r.kernel.org
Cc:	tytso@....edu, Joel Becker <Joel.Becker@...cle.com>
Subject: [PATCH] jbd2: Add BH_JBDPrivateStart

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.

Signed-off-by: Mark Fasheh <mfasheh@...e.com>
---
 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)
-- 
1.5.4.1

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