diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 60a008857a38..5c243826334a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -250,7 +250,7 @@ config SPARSE_IRQ
 
 config NUMA_MIGRATE_IRQ_DESC
 	bool "Move irq desc when changing irq smp_affinity"
-	depends on SPARSE_IRQ && SMP
+	depends on SPARSE_IRQ && NUMA
 	default n
 	help
 	  This enables moving irq_desc to cpu/node that irq will use handled.
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index bfe1245b1a3e..a74887b416cc 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -2471,7 +2471,7 @@ static void irq_complete_move(struct irq_desc **descp)
 		if (likely(!cfg->move_desc_pending))
 			return;
 
-		/* domain is not change, but affinity is changed */
+		/* domain has not changed, but affinity did */
 		me = smp_processor_id();
 		if (cpu_isset(me, desc->affinity)) {
 			*descp = desc = move_irq_desc(desc, me);
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
index 0178e2296990..089c3746358a 100644
--- a/kernel/irq/numa_migrate.c
+++ b/kernel/irq/numa_migrate.c
@@ -1,13 +1,8 @@
 /*
- * linux/kernel/irq/handle.c
- *
- * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
- * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
- *
- * This file contains the core interrupt handling code.
- *
- * Detailed information is available in Documentation/DocBook/genericirq
+ * NUMA irq-desc migration code
  *
+ * Migrate IRQ data structures (irq_desc, chip_data, etc.) over to
+ * the new "home node" of the IRQ.
  */
 
 #include <linux/irq.h>