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  */
11 static __always_inline int fls(int x)
12 {
13 	return x ? sizeof(x) * 8 - __builtin_clz(x) : 0;
14 }
15 
16 #endif
17