5 #include <linux/types.h>
8 * pfn_t: encapsulates a page-frame number that is optionally backed
9 * by memmap (struct page). Whether a pfn_t has a 'struct page'
10 * backing is indicated by flags in the high bits of the value.
17 #define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
18 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
19 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
20 #define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT)
21 #define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT))
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