1#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_ 2#define _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_ 3 4/** 5 * fls - find last (most-significant) bit set 6 * @x: the word to search 7 * 8 * This is defined the same way as ffs. 9 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. 10 */ 11static __always_inline int fls(int x) 12{ 13 return x ? sizeof(x) * 8 - __builtin_clz(x) : 0; 14} 15 16#endif 17