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

/* asm/bitops.h for Linux/CRIS
 *
 * TODO: asm versions if speed is needed
 *
 * All bit operations return 0 if the bit was cleared before the
 * operation and != 0 if it was not.
 *
 * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
 */

#ifndef _CRIS_BITOPS_H
#define _CRIS_BITOPS_H

/* Currently this is unsuitable for consumption outside the kernel.  */
#ifdef __KERNEL__ 

#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif

#include <arch/bitops.h>
#include <linux/compiler.h>
#include <asm/barrier.h>

#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>

/*
 * Since we define it "external", it collides with the built-in
 * definition, which doesn't have the same semantics.  We don't want to
 * use -fno-builtin, so just hide the name ffs.
 */
#define ffs(x) kernel_ffs(x)

#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/lock.h>

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

#include <asm-generic/bitops/ext2-atomic-setbit.h>

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

#endif /* __KERNEL__ */

#endif /* _CRIS_BITOPS_H */