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//lib/modules/2.6.32-754.el6.x86_64/source/include/linux/pfn.h
#ifndef _LINUX_PFN_H_ #define _LINUX_PFN_H_ #ifndef __ASSEMBLY__ #include <linux/types.h> #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) #endif