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

#ifndef __ASM_ALPHA_BITSPERLONG_H
#define __ASM_ALPHA_BITSPERLONG_H

#if defined(__sparc__) && defined(__arch64__)
#define __BITS_PER_LONG 64
#else
#define __BITS_PER_LONG 32
#endif

#include <asm-generic/bitsperlong.h>

#endif /* __ASM_ALPHA_BITSPERLONG_H */