diff --git a/arch/powerpc/oprofile/op_model_cell.c b/arch/powerpc/oprofile/op_model_cell.c
index 2c9e52267292..7fd90d02d8c6 100644
--- a/arch/powerpc/oprofile/op_model_cell.c
+++ b/arch/powerpc/oprofile/op_model_cell.c
@@ -1077,7 +1077,7 @@ static int calculate_lfsr(int n)
 		index = ENTRIES-1;
 
 	/* make sure index is valid */
-	if ((index > ENTRIES) || (index < 0))
+	if ((index >= ENTRIES) || (index < 0))
 		index = ENTRIES-1;
 
 	return initial_lfsr[index];
diff --git a/include/trace/events/signal.h b/include/trace/events/signal.h
index 814566c99d29..17df43464df0 100644
--- a/include/trace/events/signal.h
+++ b/include/trace/events/signal.h
@@ -10,7 +10,8 @@
 
 #define TP_STORE_SIGINFO(__entry, info)				\
 	do {							\
-		if (info == SEND_SIG_NOINFO) {			\
+		if (info == SEND_SIG_NOINFO ||			\
+		    info == SEND_SIG_FORCED) {			\
 			__entry->errno	= 0;			\
 			__entry->code	= SI_USER;		\
 		} else if (info == SEND_SIG_PRIV) {		\
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 31d6afe92594..ff86c558af4c 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1507,6 +1507,9 @@ do {					\
 		divisor = nsec * frequency;
 	}
 
+	if (!divisor)
+		return dividend;
+
 	return div64_u64(dividend, divisor);
 }
 
@@ -1529,7 +1532,7 @@ static int perf_event_start(struct perf_event *event)
 static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count)
 {
 	struct hw_perf_event *hwc = &event->hw;
-	u64 period, sample_period;
+	s64 period, sample_period;
 	s64 delta;
 
 	period = perf_calculate_period(event, nsec, count);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 7fd6b151feb5..b63e5713849f 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1745,7 +1745,12 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map,
 	if (symbol_conf.vmlinux_name != NULL) {
 		err = dso__load_vmlinux(self, map,
 					symbol_conf.vmlinux_name, filter);
-		goto out_try_fixup;
+		if (err > 0) {
+			dso__set_long_name(self,
+					   strdup(symbol_conf.vmlinux_name));
+			goto out_fixup;
+		}
+		return err;
 	}
 
 	if (vmlinux_path != NULL) {
@@ -1806,7 +1811,6 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map,
 		pr_debug("Using %s for symbols\n", kallsyms_filename);
 	free(kallsyms_allocated_filename);
 
-out_try_fixup:
 	if (err > 0) {
 out_fixup:
 		if (kallsyms_filename != NULL)