builtin-__ffs.h 379 B

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
  3. #define _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
  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. #endif