diff options
Diffstat (limited to 'arch/m68k/include')
| -rw-r--r-- | arch/m68k/include/asm/bitops_mm.h | 93 |
1 files changed, 67 insertions, 26 deletions
diff --git a/arch/m68k/include/asm/bitops_mm.h b/arch/m68k/include/asm/bitops_mm.h index 31a16d47d20..d4658487def 100644 --- a/arch/m68k/include/asm/bitops_mm.h +++ b/arch/m68k/include/asm/bitops_mm.h @@ -359,24 +359,45 @@ static inline int minix_test_bit(int nr, const void *vaddr) return (p[nr >> 4] & (1U << (nr & 15))) != 0; } -/* Bitmap functions for the ext2 filesystem. */ +/* Bitmap functions for the little endian bitmap. */ + +static inline void __set_bit_le(int nr, void *addr) +{ + __set_bit(nr ^ 24, addr); +} -#define ext2_set_bit(nr, addr) __test_and_set_bit((nr) ^ 24, (unsigned long *)(addr)) -#define ext2_set_bit_atomic(lock, nr, addr) test_and_set_bit((nr) ^ 24, (unsigned long *)(addr)) -#define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr)) -#define ext2_clear_bit_atomic(lock, nr, addr) test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr)) -#define ext2_find_next_zero_bit(addr, size, offset) \ - find_next_zero_bit_le((unsigned long *)addr, size, offset) -#define ext2_find_next_bit(addr, size, offset) \ - find_next_bit_le((unsigned long *)addr, size, offset) +static inline void __clear_bit_le(int nr, void *addr) +{ + __clear_bit(nr ^ 24, addr); +} + +static inline int __test_and_set_bit_le(int nr, void *addr) +{ + return __test_and_set_bit(nr ^ 24, addr); +} + +static inline int test_and_set_bit_le(int nr, void *addr) +{ + return test_and_set_bit(nr ^ 24, addr); +} + +static inline int __test_and_clear_bit_le(int nr, void *addr) +{ + return __test_and_clear_bit(nr ^ 24, addr); +} -static inline int ext2_test_bit(int nr, const void *vaddr) +static inline int test_and_clear_bit_le(int nr, void *addr) +{ + return test_and_clear_bit(nr ^ 24, addr); +} + +static inline int test_bit_le(int nr, const void *vaddr) { const unsigned char *p = vaddr; return (p[nr >> 3] & (1U << (nr & 7))) != 0; } -static inline int ext2_find_first_zero_bit(const void *vaddr, unsigned size) +static inline int find_first_zero_bit_le(const void *vaddr, unsigned size) { const unsigned long *p = vaddr, *addr = vaddr; int res; @@ -393,33 +414,36 @@ static inline int ext2_find_first_zero_bit(const void *vaddr, unsigned size) --p; for (res = 0; res < 32; res++) - if (!ext2_test_bit (res, p)) + if (!test_bit_le(res, p)) break; return (p - addr) * 32 + res; } -static inline unsigned long find_next_zero_bit_le(const unsigned long *addr, +static inline unsigned long find_next_zero_bit_le(const void *addr, unsigned long size, unsigned long offset) { - const unsigned long *p = addr + (offset >> 5); + const unsigned long *p = addr; int bit = offset & 31UL, res; if (offset >= size) return size; + p += offset >> 5; + if (bit) { + offset -= bit; /* Look for zero in first longword */ for (res = bit; res < 32; res++) - if (!ext2_test_bit (res, p)) - return (p - addr) * 32 + res; + if (!test_bit_le(res, p)) + return offset + res; p++; + offset += 32; } /* No zero yet, search remaining full bytes for a zero */ - res = ext2_find_first_zero_bit (p, size - 32 * (p - addr)); - return (p - addr) * 32 + res; + return offset + find_first_zero_bit_le(p, size - offset); } -static inline int ext2_find_first_bit(const void *vaddr, unsigned size) +static inline int find_first_bit_le(const void *vaddr, unsigned size) { const unsigned long *p = vaddr, *addr = vaddr; int res; @@ -435,32 +459,49 @@ static inline int ext2_find_first_bit(const void *vaddr, unsigned size) --p; for (res = 0; res < 32; res++) - if (ext2_test_bit(res, p)) + if (test_bit_le(res, p)) break; return (p - addr) * 32 + res; } -static inline unsigned long find_next_bit_le(const unsigned long *addr, +static inline unsigned long find_next_bit_le(const void *addr, unsigned long size, unsigned long offset) { - const unsigned long *p = addr + (offset >> 5); + const unsigned long *p = addr; int bit = offset & 31UL, res; if (offset >= size) return size; + p += offset >> 5; + if (bit) { + offset -= bit; /* Look for one in first longword */ for (res = bit; res < 32; res++) - if (ext2_test_bit(res, p)) - return (p - addr) * 32 + res; + if (test_bit_le(res, p)) + return offset + res; p++; + offset += 32; } /* No set bit yet, search remaining full bytes for a set bit */ - res = ext2_find_first_bit(p, size - 32 * (p - addr)); - return (p - addr) * 32 + res; + return offset + find_first_bit_le(p, size - offset); } +/* Bitmap functions for the ext2 filesystem. */ + +#define ext2_set_bit __test_and_set_bit_le +#define ext2_set_bit_atomic(lock, nr, addr) \ + test_and_set_bit_le(nr, addr) +#define ext2_clear_bit __test_and_clear_bit_le +#define ext2_clear_bit_atomic(lock, nr, addr) \ + test_and_clear_bit_le(nr, addr) +#define ext2_find_next_zero_bit find_next_zero_bit_le +#define ext2_find_next_bit find_next_bit_le +#define ext2_test_bit test_bit_le +#define ext2_find_first_zero_bit find_first_zero_bit_le +#define ext2_find_first_bit find_first_bit_le + #endif /* __KERNEL__ */ #endif /* _M68K_BITOPS_H */ |