diff --git a/[refs] b/[refs]
index 2ac4c68ef4d6..9288f75c40e9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 54ef91dcf094313fb4fbe87713c11fb55bcf15a9
+refs/heads/master: dfea91d5a7c795fd6f4e1a97489a98e4e767463e
diff --git a/trunk/arch/x86/kernel/apic/apic_flat_64.c b/trunk/arch/x86/kernel/apic/apic_flat_64.c
index eacbd2b31d27..e3c3d820c325 100644
--- a/trunk/arch/x86/kernel/apic/apic_flat_64.c
+++ b/trunk/arch/x86/kernel/apic/apic_flat_64.c
@@ -240,6 +240,11 @@ static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 		printk(KERN_DEBUG "system APIC only can use physical flat");
 		return 1;
 	}
+
+	if (!strncmp(oem_id, "IBM", 3) && !strncmp(oem_table_id, "EXA", 3)) {
+		printk(KERN_DEBUG "IBM Summit detected, will use apic physical");
+		return 1;
+	}
 #endif
 
 	return 0;