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Edit File: pfn.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_PFN_H_ #define _LINUX_PFN_H_ #ifndef __ASSEMBLY__ #include <linux/types.h> /* * pfn_t: encapsulates a page-frame number that is optionally backed * by memmap (struct page). Whether a pfn_t has a 'struct page' * backing is indicated by flags in the high bits of the value. */ typedef struct { u64 val; } pfn_t; #endif #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) #define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT) #define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT)) #endif
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