gart_mem_pfn_is_ram 81 arch/x86/kernel/aperture_64.c WARN_ON(register_oldmem_pfn_is_ram(&gart_mem_pfn_is_ram)); gart_mem_pfn_is_ram 84 arch/x86/kernel/aperture_64.c WARN_ON(register_mem_pfn_is_ram(&gart_mem_pfn_is_ram));