diff options
| author | Akinobu Mita <akinobu.mita@gmail.com> | 2011-03-23 16:42:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-23 19:46:14 -0700 |
| commit | c1e6ca7a501f0139e5ec2a01f8420eeb21c97a52 (patch) | |
| tree | 538f5424eedda1039dec6d6cc5f81cbee16e2e1b /arch/m68k | |
| parent | 0664996b7c2fdb1b7f90954469cc242274abd7db (diff) | |
m68knommu: introduce little-endian bitops
Introduce little-endian bit operations by renaming native ext2 bit
operations. The ext2 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>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
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/m68k')
| -rw-r--r-- | arch/m68k/include/asm/bitops_no.h | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/arch/m68k/include/asm/bitops_no.h b/arch/m68k/include/asm/bitops_no.h index 58c67aaf91e2..74b3f81f2e21 100644 --- a/arch/m68k/include/asm/bitops_no.h +++ b/arch/m68k/include/asm/bitops_no.h @@ -196,7 +196,19 @@ static __inline__ int __test_bit(int nr, const volatile unsigned long * addr) #include <asm-generic/bitops/hweight.h> #include <asm-generic/bitops/lock.h> -static __inline__ int ext2_set_bit(int nr, volatile void * addr) +#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7) + +static inline void __set_bit_le(int nr, void *addr) +{ + __set_bit(nr ^ BITOP_LE_SWIZZLE, addr); +} + +static inline void __clear_bit_le(int nr, void *addr) +{ + __clear_bit(nr ^ BITOP_LE_SWIZZLE, addr); +} + +static inline int __test_and_set_bit_le(int nr, volatile void *addr) { char retval; @@ -215,7 +227,7 @@ static __inline__ int ext2_set_bit(int nr, volatile void * addr) return retval; } -static __inline__ int ext2_clear_bit(int nr, volatile void * addr) +static inline int __test_and_clear_bit_le(int nr, volatile void *addr) { char retval; @@ -238,7 +250,7 @@ static __inline__ int ext2_clear_bit(int nr, volatile void * addr) ({ \ int ret; \ spin_lock(lock); \ - ret = ext2_set_bit((nr), (addr)); \ + ret = __test_and_set_bit_le((nr), (addr)); \ spin_unlock(lock); \ ret; \ }) @@ -247,12 +259,12 @@ static __inline__ int ext2_clear_bit(int nr, volatile void * addr) ({ \ int ret; \ spin_lock(lock); \ - ret = ext2_clear_bit((nr), (addr)); \ + ret = __test_and_clear_bit_le((nr), (addr)); \ spin_unlock(lock); \ ret; \ }) -static __inline__ int ext2_test_bit(int nr, const volatile void * addr) +static inline int test_bit_le(int nr, const volatile void *addr) { char retval; @@ -271,10 +283,10 @@ static __inline__ int ext2_test_bit(int nr, const volatile void * addr) return retval; } -#define ext2_find_first_zero_bit(addr, size) \ - ext2_find_next_zero_bit((addr), (size), 0) +#define find_first_zero_bit_le(addr, size) \ + find_next_zero_bit_le((addr), (size), 0) -static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, unsigned long size, unsigned long offset) +static inline unsigned long find_next_zero_bit_le(void *addr, unsigned long size, unsigned long offset) { unsigned long *p = ((unsigned long *) addr) + (offset >> 5); unsigned long result = offset & ~31UL; @@ -324,8 +336,13 @@ found_middle: return result + ffz(__swab32(tmp)); } -#define ext2_find_next_bit(addr, size, off) \ - find_next_bit_le((unsigned long *)(addr), (size), (off)) +#define ext2_set_bit __test_and_set_bit_le +#define ext2_clear_bit __test_and_clear_bit_le +#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 + #include <asm-generic/bitops/minix.h> #endif /* __KERNEL__ */ |