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#ifndef _LINUX_PFN_H_ #define _LINUX_PFN_H_ #define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK) #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) #define PFN_DOWN(x) ((x) >> PAGE_SHIFT) #if defined(CONFIG_X86_XEN) && defined(CONFIG_X86_PAE) #define PFN_PHYS(x) ((unsigned long long)(x) << PAGE_SHIFT) #else #define PFN_PHYS(x) ((x) << PAGE_SHIFT) #endif #endif