kernel/include/asm-generic/bitops/builtin-__ffs.h

   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  */
  10 static __always_inline unsigned long __ffs(unsigned long word)
  11 {
  12         return __builtin_ctzl(word);
  13 }
  14
  15 #endif