diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 5efa2647a2fb3bcdf26c58cec440adbc88724e74..d150ad1ccb5d8e3212e6461288f2c0a7ed451c85 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -700,7 +700,7 @@ user_backtrace(struct frame_tail __user *tail,
 	 * Frame pointers should strictly progress back up the stack
 	 * (towards higher addresses).
 	 */
-	if (tail >= buftail.fp)
+	if (tail + 1 >= buftail.fp)
 		return NULL;
 
 	return buftail.fp - 1;
diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c
index 8aa974491dfcd555a6962461c0d2aa5f3287b653..6adda2b5fa31728a934c7400bcd17d5724d265ca 100644
--- a/arch/arm/oprofile/common.c
+++ b/arch/arm/oprofile/common.c
@@ -85,7 +85,7 @@ static struct frame_tail* user_backtrace(struct frame_tail *tail)
 
 	/* frame pointers should strictly progress back up the stack
 	 * (towards higher addresses) */
-	if (tail >= buftail[0].fp)
+	if (tail + 1 >= buftail[0].fp)
 		return NULL;
 
 	return buftail[0].fp-1;