ppc64: add comment and missing include

arch/ppc64/kernel/head.S

@@ -1125,7 +1125,9 @@ _GLOBAL(save_remaining_regs)
 	mtmsrd  r22,1
 	blr
 
-
+/*
+ * Kernel profiling with soft disable on iSeries
+ */
 do_profile:
 	ld	r22,8(r21)		/* Get SRR1 */
 	andi.	r22,r22,MSR_PR		/* Test if in kernel */

arch/ppc64/xmon/xmon.c

@@ -14,6 +14,7 @@
 #include <linux/smp.h>
 #include <linux/mm.h>
 #include <linux/reboot.h>
+#include <linux/delay.h>
 #include <asm/ptrace.h>
 #include <asm/string.h>
 #include <asm/prom.h>