1. 根目录:
2. arch
3. parisc
4. include
5. uapi
6. asm
7. bitsperlong.h

#ifndef __ASM_PARISC_BITSPERLONG_H
#define __ASM_PARISC_BITSPERLONG_H

/*
 * using CONFIG_* outside of __KERNEL__ is wrong,
 * __LP64__ was also removed from headers, so what
 * is the right approach on parisc?
 *	-arnd
 */
#if (defined(__KERNEL__) && defined(CONFIG_64BIT)) || defined (__LP64__)
#define __BITS_PER_LONG 64
#define SHIFT_PER_LONG 6
#else
#define __BITS_PER_LONG 32
#define SHIFT_PER_LONG 5
#endif

#include <asm-generic/bitsperlong.h>

#endif /* __ASM_PARISC_BITSPERLONG_H */