diff --git a/arch/arm/mach-omap/omap4_generic.c b/arch/arm/mach-omap/omap4_generic.c
index 5223c7e..c6e46e6 100644
--- a/arch/arm/mach-omap/omap4_generic.c
+++ b/arch/arm/mach-omap/omap4_generic.c
@@ -352,6 +352,7 @@
 
 	unsigned int i;
 
+	/* Read Main ID Register (MIDR) */
 	asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (i));
 
 	return i;