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Date: Sat, 22 Jan 2011 22:13:40 +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>, Russell King <rmk+kernel@....linux.org.uk> Subject: [PATCH v5 08/27] 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@...il.com> Cc: Russell King <rmk+kernel@....linux.org.uk> Signed-off-by: Andrew Morton <akpm@...ux-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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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