linux-kernel - [PATCH 1/1] fs/jfs/jfs_inode.c: atomically set inode->i

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Message-Id: <20140402192950.82812a331cb154bbc0a4183c@skynet.be>
Date:	Wed, 2 Apr 2014 19:29:50 +0200
From:	Fabian Frederick <fabf@...net.be>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	akpm <akpm@...ux-foundation.org>,
	jfs-discussion@...ts.sourceforge.net
Subject: [PATCH 1/1] fs/jfs/jfs_inode.c: atomically set inode->i_flags

According to commit 00a1a053ebe5f
("ext4: atomically set inode->i_flags in ext4_set_inode_flags()")

Inspired-by: "Theodore Ts'o" <tytso@....edu>
Cc: jfs-discussion@...ts.sourceforge.net
Cc: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 fs/jfs/jfs_inode.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/jfs/jfs_inode.c b/fs/jfs/jfs_inode.c
index 7f464c5..3309074 100644
--- a/fs/jfs/jfs_inode.c
+++ b/fs/jfs/jfs_inode.c
@@ -29,20 +29,20 @@
 void jfs_set_inode_flags(struct inode *inode)
 {
 	unsigned int flags = JFS_IP(inode)->mode2;
-
-	inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
-		S_NOATIME | S_DIRSYNC | S_SYNC);
+	unsigned int new_fl = 0;
 
 	if (flags & JFS_IMMUTABLE_FL)
-		inode->i_flags |= S_IMMUTABLE;
+		new_fl |= S_IMMUTABLE;
 	if (flags & JFS_APPEND_FL)
-		inode->i_flags |= S_APPEND;
+		new_fl |= S_APPEND;
 	if (flags & JFS_NOATIME_FL)
-		inode->i_flags |= S_NOATIME;
+		new_fl |= S_NOATIME;
 	if (flags & JFS_DIRSYNC_FL)
-		inode->i_flags |= S_DIRSYNC;
+		new_fl |= S_DIRSYNC;
 	if (flags & JFS_SYNC_FL)
-		inode->i_flags |= S_SYNC;
+		new_fl |= S_SYNC;
+	set_mask_bits(&inode->i_flags, S_IMMUTABLE | S_APPEND | S_NOATIME |
+				       S_DIRSYNC | S_SYNC, new_fl);
 }
 
 void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
-- 
1.8.4.5

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