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#ifndef _LINUX_PAGE_H
#define _LINUX_PAGE_H
#include <sys/user.h>
struct page;
#define virt_to_page(p) \
((struct page *) (((unsigned long) (p)) & PAGE_MASK))
#define offset_in_page(p) ((unsigned long) (p) & ~PAGE_MASK)
#define page_address(p) ((void *) (p))
#define kmap_atomic(page) page_address(page)
#define kunmap_atomic(addr) do {} while (0)
static const char zero_page[PAGE_SIZE];
#define ZERO_PAGE(o) ((struct page *) &zero_page[0])
#endif /* _LINUX_PAGE_H */
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