1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_ 3*4882a593Smuzhiyun #define _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_ 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /** 6*4882a593Smuzhiyun * __ffs - find first bit in word. 7*4882a593Smuzhiyun * @word: The word to search 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Undefined if no bit exists, so code should check against 0 first. 10*4882a593Smuzhiyun */ __ffs(unsigned long word)11*4882a593Smuzhiyunstatic __always_inline unsigned long __ffs(unsigned long word) 12*4882a593Smuzhiyun { 13*4882a593Smuzhiyun return __builtin_ctzl(word); 14*4882a593Smuzhiyun } 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #endif 17