diff options
Diffstat (limited to 'include/asm-x86/bitops_32.h')
-rw-r--r-- | include/asm-x86/bitops_32.h | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/include/asm-x86/bitops_32.h b/include/asm-x86/bitops_32.h index ba2c0defafa..2e863021bf8 100644 --- a/include/asm-x86/bitops_32.h +++ b/include/asm-x86/bitops_32.h @@ -4,64 +4,6 @@ /* * Copyright 1992, Linus Torvalds. */ - -#ifndef CONFIG_GENERIC_FIND_FIRST_BIT -/** - * find_first_zero_bit - find the first zero bit in a memory region - * @addr: The address to start the search at - * @size: The maximum size to search - * - * Returns the bit number of the first zero bit, not the number of the byte - * containing a bit. - */ -static inline int find_first_zero_bit(const unsigned long *addr, unsigned size) -{ - int d0, d1, d2; - int res; - - if (!size) - return 0; - /* This looks at memory. - * Mark it volatile to tell gcc not to move it around - */ - asm volatile("movl $-1,%%eax\n\t" - "xorl %%edx,%%edx\n\t" - "repe; scasl\n\t" - "je 1f\n\t" - "xorl -4(%%edi),%%eax\n\t" - "subl $4,%%edi\n\t" - "bsfl %%eax,%%edx\n" - "1:\tsubl %%ebx,%%edi\n\t" - "shll $3,%%edi\n\t" - "addl %%edi,%%edx" - : "=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2) - : "1" ((size + 31) >> 5), "2" (addr), - "b" (addr) : "memory"); - return res; -} - -/** - * find_first_bit - find the first set bit in a memory region - * @addr: The address to start the search at - * @size: The maximum size to search - * - * Returns the bit number of the first set bit, not the number of the byte - * containing a bit. - */ -static inline unsigned find_first_bit(const unsigned long *addr, unsigned size) -{ - unsigned x = 0; - - while (x < size) { - unsigned long val = *addr++; - if (val) - return __ffs(val) + x; - x += sizeof(*addr) << 3; - } - return x; -} -#endif - #ifdef __KERNEL__ #include <asm-generic/bitops/sched.h> |