MAXMEM 16 arch/x86/kernel/doublefault_32.c #define ptr_ok(x) ((x) > PAGE_OFFSET && (x) < PAGE_OFFSET + MAXMEM) MAXMEM 1052 arch/x86/kernel/e820.c # define MAX_ARCH_PFN MAXMEM>>PAGE_SHIFT MAXMEM 658 arch/x86/mm/init_32.c MAXMEM>>20); MAXMEM 41 arch/x86/mm/ioremap.c VIRTUAL_BUG_ON(system_state == SYSTEM_BOOTING ? x > MAXMEM : MAXMEM 60 arch/x86/mm/ioremap.c x > MAXMEM : !phys_addr_valid(x)) { MAXMEM 60 include/asm-x86/setup.h #define MAXMEM_PFN PFN_DOWN(MAXMEM)