linux-kernel - [PATCH v4 14/24] ext4: use little-endian bitops

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Date:	Sun, 16 Jan 2011 22:08:43 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	"Theodore Ts'o" <tytso@....edu>
Subject: [PATCH v4 14/24] ext4: use little-endian bitops

As a preparation for removing ext2 non-atomic bit operations from
asm/bitops.h.  This converts ext2 non-atomic bit operations to
little-endian bit operations.

Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Acked-by: "Theodore Ts'o" <tytso@....edu>
Cc: Andreas Dilger <adilger.kernel@...ger.ca>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

Change from v3:
 - change to the post-fix notation e.g. s/test_le_bit/test_bit_le/

The whole series is available in the git repository at:
 git://git.kernel.org/pub/scm/linux/kernel/git/mita/linux-2.6.git le-bitops-v4

 fs/ext4/ext4.h |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 1de65f5..eaad5fc 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -922,14 +922,20 @@ struct ext4_inode_info {
 #define test_opt2(sb, opt)		(EXT4_SB(sb)->s_mount_opt2 & \
 					 EXT4_MOUNT2_##opt)
 
-#define ext4_set_bit			ext2_set_bit
+#define ext4_set_bit(nr, addr)	\
+	__test_and_set_bit_le((nr), (unsigned long *)(addr))
 #define ext4_set_bit_atomic		ext2_set_bit_atomic
-#define ext4_clear_bit			ext2_clear_bit
+#define ext4_clear_bit(nr, addr)	\
+	__test_and_clear_bit_le((nr), (unsigned long *)(addr))
 #define ext4_clear_bit_atomic		ext2_clear_bit_atomic
-#define ext4_test_bit			ext2_test_bit
-#define ext4_find_first_zero_bit	ext2_find_first_zero_bit
-#define ext4_find_next_zero_bit		ext2_find_next_zero_bit
-#define ext4_find_next_bit		ext2_find_next_bit
+#define ext4_test_bit(nr, addr)	\
+	test_bit_le((nr), (unsigned long *)(addr))
+#define ext4_find_first_zero_bit(addr, size)	\
+	find_first_zero_bit_le((unsigned long *)(addr), (size))
+#define ext4_find_next_zero_bit(addr, size, off)	\
+	find_next_zero_bit_le((unsigned long *)(addr), (size), (off))
+#define ext4_find_next_bit(addr, size, off)	\
+	find_next_bit_le((unsigned long *)(addr), (size), (off))
 
 /*
  * Maximal mount counts between two filesystem checks
-- 
1.7.3.4

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