asm-generic/bitops/builtin-__ffs.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
0003 #define _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
0004
0005 /**
0006  * __ffs - find first bit in word.
0007  * @word: The word to search
0008  *
0009  * Undefined if no bit exists, so code should check against 0 first.
0010  */
0011 static __always_inline unsigned long __ffs(unsigned long word)
0012 {
0013     return __builtin_ctzl(word);
0014 }
0015
0016 #endif