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author | Akinobu Mita <akinobu.mita@gmail.com> | 2011-03-23 16:41:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-23 19:46:13 -0700 |
commit | f6b57e322f85f9d69db15ca112ee33cab33041b8 (patch) | |
tree | b532c0f0088bece8af632ac5273672f79f5cb127 /arch/arm/include | |
parent | 50b9b475c5b3e6649c22e1d39ab3ced3dbf21758 (diff) | |
download | linux-f6b57e322f85f9d69db15ca112ee33cab33041b8.tar.bz2 |
arm: introduce little-endian bitops
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>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/include')
-rw-r--r-- | arch/arm/include/asm/bitops.h | 91 |
1 files changed, 65 insertions, 26 deletions
diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h index af54ed102f5f..0112005f3e9f 100644 --- a/arch/arm/include/asm/bitops.h +++ b/arch/arm/include/asm/bitops.h @@ -287,41 +287,80 @@ static inline int fls(int x) #include <asm-generic/bitops/hweight.h> #include <asm-generic/bitops/lock.h> +static inline void __set_bit_le(int nr, void *addr) +{ + __set_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline void __clear_bit_le(int nr, void *addr) +{ + __clear_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline int __test_and_set_bit_le(int nr, void *addr) +{ + return __test_and_set_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline int test_and_set_bit_le(int nr, void *addr) +{ + return test_and_set_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline int __test_and_clear_bit_le(int nr, void *addr) +{ + return __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline int test_and_clear_bit_le(int nr, void *addr) +{ + return test_and_clear_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline int test_bit_le(int nr, const void *addr) +{ + return test_bit(WORD_BITOFF_TO_LE(nr), addr); +} + +static inline int find_first_zero_bit_le(const void *p, unsigned size) +{ + return _find_first_zero_bit_le(p, size); +} + +static inline int find_next_zero_bit_le(const void *p, int size, int offset) +{ + return _find_next_zero_bit_le(p, size, offset); +} + +static inline int find_next_bit_le(const void *p, int size, int offset) +{ + return _find_next_bit_le(p, size, offset); +} + /* * 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__ */ |