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