LXR linux/include/asm-generic/bitops/builtin-_

   1#ifndef _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
   2#define _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
   3
   4/**
   5 * __ffs - find first bit in word.
   6 * @word: The word to search
   7 *
   8 * Undefined if no bit exists, so code should check against 0 first.
   9 */
  10static __always_inline unsigned long __ffs(unsigned long word)
  11{
  12        return __builtin_ctzl(word);
  13}
  14
  15#endif
  16