1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_ 3 #define _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_ 4 5 /** 6 * __fls - find last (most-significant) set bit in a long word 7 * @word: the word to search 8 * 9 * Undefined if no set bit exists, so code should check against 0 first. 10 */ 11 static __always_inline unsigned long __fls(unsigned long word) 12 { 13 return (sizeof(word) * 8) - 1 - __builtin_clzl(word); 14 } 15 16 #endif 17