1. 根目录:
2. arch
3. ia64
4. include
5. asm
6. linkage.h

#ifndef __ASM_LINKAGE_H
#define __ASM_LINKAGE_H

#ifndef __ASSEMBLY__

#define asmlinkage CPP_ASMLINKAGE __attribute__((syscall_linkage))

#else

#include <asm/asmmacro.h>

#endif

#endif