1. 根目录:
2. arch
3. score
4. include
5. asm
6. bitops.h

#ifndef _ASM_SCORE_BITOPS_H
#define _ASM_SCORE_BITOPS_H

#include <asm/byteorder.h> /* swab32 */
#include <asm/system.h> /* save_flags */

/*
 * clear_bit() doesn't provide any barrier for the compiler.
 */
#define smp_mb__before_clear_bit()	barrier()
#define smp_mb__after_clear_bit()	barrier()

#include <asm-generic/bitops.h>
#include <asm-generic/bitops/__fls.h>

#endif /* _ASM_SCORE_BITOPS_H */