iomem_pages 30 arch/um/kernel/physmem.c unsigned long iomem_pages, total_pages; iomem_pages 33 arch/um/kernel/physmem.c iomem_pages = iomem >> PAGE_SHIFT; iomem_pages 36 arch/um/kernel/physmem.c total_pages = phys_pages + iomem_pages + highmem_pages;