ARCH_PFN_OFFSET 8 include/asm-generic/memory_model.h #ifndef ARCH_PFN_OFFSET ARCH_PFN_OFFSET 30 include/asm-generic/memory_model.h #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) ARCH_PFN_OFFSET 32 include/asm-generic/memory_model.h ARCH_PFN_OFFSET) ARCH_PFN_OFFSET 74 include/asm-generic/page.h #ifndef ARCH_PFN_OFFSET ARCH_PFN_OFFSET 93 include/asm-generic/page.h #define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)