diff options
Diffstat (limited to 'arch/x86/lib/bitops_64.c')
| -rw-r--r-- | arch/x86/lib/bitops_64.c | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/arch/x86/lib/bitops_64.c b/arch/x86/lib/bitops_64.c index 0e8f491e6cc..0eeb704d251 100644 --- a/arch/x86/lib/bitops_64.c +++ b/arch/x86/lib/bitops_64.c @@ -1,9 +1,7 @@ #include <linux/bitops.h> #undef find_first_zero_bit -#undef find_next_zero_bit #undef find_first_bit -#undef find_next_bit static inline long __find_first_zero_bit(const unsigned long * addr, unsigned long size) @@ -57,39 +55,6 @@ long find_first_zero_bit(const unsigned long * addr, unsigned long size) return __find_first_zero_bit (addr, size); } -/** - * find_next_zero_bit - find the next zero bit in a memory region - * @addr: The address to base the search on - * @offset: The bitnumber to start searching at - * @size: The maximum size to search - */ -long find_next_zero_bit (const unsigned long * addr, long size, long offset) -{ - const unsigned long * p = addr + (offset >> 6); - unsigned long set = 0; - unsigned long res, bit = offset&63; - - if (bit) { - /* - * Look for zero in first word - */ - asm("bsfq %1,%0\n\t" - "cmoveq %2,%0" - : "=r" (set) - : "r" (~(*p >> bit)), "r"(64L)); - if (set < (64 - bit)) - return set + offset; - set = 64 - bit; - p++; - } - /* - * No zero yet, search remaining full words for a zero - */ - res = __find_first_zero_bit (p, size - 64 * (p - addr)); - - return (offset + set + res); -} - static inline long __find_first_bit(const unsigned long * addr, unsigned long size) { @@ -136,40 +101,7 @@ long find_first_bit(const unsigned long * addr, unsigned long size) return __find_first_bit(addr,size); } -/** - * find_next_bit - find the first set bit in a memory region - * @addr: The address to base the search on - * @offset: The bitnumber to start searching at - * @size: The maximum size to search - */ -long find_next_bit(const unsigned long * addr, long size, long offset) -{ - const unsigned long * p = addr + (offset >> 6); - unsigned long set = 0, bit = offset & 63, res; - - if (bit) { - /* - * Look for nonzero in the first 64 bits: - */ - asm("bsfq %1,%0\n\t" - "cmoveq %2,%0\n\t" - : "=r" (set) - : "r" (*p >> bit), "r" (64L)); - if (set < (64 - bit)) - return set + offset; - set = 64 - bit; - p++; - } - /* - * No set bit yet, search remaining full words for a bit - */ - res = __find_first_bit (p, size - 64 * (p - addr)); - return (offset + set + res); -} - #include <linux/module.h> -EXPORT_SYMBOL(find_next_bit); EXPORT_SYMBOL(find_first_bit); EXPORT_SYMBOL(find_first_zero_bit); -EXPORT_SYMBOL(find_next_zero_bit); |