HelenOS sources

pat_set_mapping   121 kernel/arch/amd64/src/amd64.c 		pat_set_mapping(false, true, true, PAT_TYPE_WRITE_COMBINING);
pat_set_mapping   110 kernel/arch/ia32/src/ia32.c 		pat_set_mapping(false, true, true, PAT_TYPE_WRITE_COMBINING);