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/******************************************************************************
* foreign_page.h
*
* Provide a "foreign" page type, that is owned by a foreign allocator and
* not the normal buddy allocator in page_alloc.c
*
* Copyright (c) 2004, K A Fraser
*/
#ifndef __ASM_XEN_FOREIGN_PAGE_H__
#define __ASM_XEN_FOREIGN_PAGE_H__
#define PG_foreign PG_arch_1
#define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
#define SetPageForeign(page, dtor) do { \
set_bit(PG_foreign, &(page)->flags); \
(page)->mapping = (void *)dtor; \
} while (0)
#define ClearPageForeign(page) do { \
clear_bit(PG_foreign, &(page)->flags); \
(page)->mapping = NULL; \
} while (0)
#define PageForeignDestructor(page) \
( (void (*) (struct page *)) (page)->mapping )
#endif /* __ASM_XEN_FOREIGN_PAGE_H__ */