1. 根目录:
2. arch
3. s390
4. include
5. asm
6. cacheflush.h

#ifndef _S390_CACHEFLUSH_H
#define _S390_CACHEFLUSH_H

/* Caches aren't brain-dead on the s390. */
#include <asm-generic/cacheflush.h>

#ifdef CONFIG_DEBUG_PAGEALLOC
void kernel_map_pages(struct page *page, int numpages, int enable);
#endif

int set_memory_ro(unsigned long addr, int numpages);
int set_memory_rw(unsigned long addr, int numpages);
int set_memory_nx(unsigned long addr, int numpages);

#endif /* _S390_CACHEFLUSH_H */