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Subject[PATCH v5 08/27] arm: introduce little-endian bitops
Date
Introduce little-endian bit operations by renaming native ext2 bit
operations. The ext2 and minix bit operations are kept as wrapper
macros using little-endian bit operations to maintain bisectability
until the conversions are finished.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
Change from v4:
- add casts in the macro to take any pointer types
- drop acked-by line because enough changes has been made

The whole series is available in the git branch at:
git://git.kernel.org/pub/scm/linux/kernel/git/mita/linux-2.6.git le-bitops-v5

arch/arm/include/asm/bitops.h | 61 +++++++++++++++++++++++-----------------
1 files changed, 35 insertions(+), 26 deletions(-)
diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
index 7b1bb2b..872d502 100644
--- a/arch/arm/include/asm/bitops.h
+++ b/arch/arm/include/asm/bitops.h
@@ -303,41 +303,50 @@ static inline int fls(int x)
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>

+#define __set_bit_le(nr, p) \
+ __set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define __clear_bit_le(nr, p) \
+ __clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define __test_and_set_bit_le(nr, p) \
+ __test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define test_and_set_bit_le(nr, p) \
+ test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define __test_and_clear_bit_le(nr, p) \
+ __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define test_and_clear_bit_le(nr, p) \
+ test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define test_bit_le(nr, p) \
+ test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+#define find_first_zero_bit_le(p, sz) \
+ _find_first_zero_bit_le(p, sz)
+#define find_next_zero_bit_le(p, sz, off) \
+ _find_next_zero_bit_le(p, sz, off)
+#define find_next_bit_le(p, sz, off) \
+ _find_next_bit_le((unsigned long *)(p), sz, off)
/*
* Ext2 is defined to use little-endian byte ordering.
* These do not need to be atomic.
*/
-#define ext2_set_bit(nr,p) \
- __test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_set_bit_atomic(lock,nr,p) \
- test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_clear_bit(nr,p) \
- __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_clear_bit_atomic(lock,nr,p) \
- test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_test_bit(nr,p) \
- test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_find_first_zero_bit(p,sz) \
- _find_first_zero_bit_le(p,sz)
-#define ext2_find_next_zero_bit(p,sz,off) \
- _find_next_zero_bit_le(p,sz,off)
-#define ext2_find_next_bit(p, sz, off) \
- _find_next_bit_le(p, sz, off)
+#define ext2_set_bit __test_and_set_bit_le
+#define ext2_set_bit_atomic(lock, nr, p) \
+ test_and_set_bit_le(nr, p)
+#define ext2_clear_bit __test_and_clear_bit_le
+#define ext2_clear_bit_atomic(lock, nr, p) \
+ test_and_clear_bit_le(nr, p)
+#define ext2_test_bit test_bit_le
+#define ext2_find_first_zero_bit find_first_zero_bit_le
+#define ext2_find_next_zero_bit find_next_zero_bit_le
+#define ext2_find_next_bit find_next_bit_le

/*
* Minix is defined to use little-endian byte ordering.
* These do not need to be atomic.
*/
-#define minix_set_bit(nr,p) \
- __set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_test_bit(nr,p) \
- test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_test_and_set_bit(nr,p) \
- __test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_test_and_clear_bit(nr,p) \
- __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_find_first_zero_bit(p,sz) \
- _find_first_zero_bit_le(p,sz)
+#define minix_set_bit __set_bit_le
+#define minix_test_bit test_bit_le
+#define minix_test_and_set_bit __test_and_set_bit_le
+#define minix_test_and_clear_bit __test_and_clear_bit_le
+#define minix_find_first_zero_bit find_first_zero_bit_le

#endif /* __KERNEL__ */

--
1.7.3.4


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