diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d409b6e2aa43..559f2ad02a41 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4470,7 +4470,7 @@ static int trace_set_options(struct trace_array *tr, char *option)
 
 	cmp = strstrip(option);
 
-	if (strncmp(cmp, "no", 2) == 0) {
+	if (str_has_prefix(cmp, "no")) {
 		neg = 1;
 		cmp += 2;
 	}
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 949eac9362a6..a982cbfcb9f1 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1249,7 +1249,7 @@ static int f_show(struct seq_file *m, void *v)
 	 */
 	array_descriptor = strchr(field->type, '[');
 
-	if (!strncmp(field->type, "__data_loc", 10))
+	if (str_has_prefix(field->type, "__data_loc"))
 		array_descriptor = NULL;
 
 	if (!array_descriptor)
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 1441c3934cbf..95f5e328a98b 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -484,7 +484,7 @@ static int synth_event_define_fields(struct trace_event_call *call)
 
 static bool synth_field_signed(char *type)
 {
-	if (strncmp(type, "u", 1) == 0)
+	if (str_has_prefix(type, "u"))
 		return false;
 	if (strcmp(type, "gfp_t") == 0)
 		return false;
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index d85ee1778b99..6efd38b5843c 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -342,7 +342,7 @@ static int parse_probe_vars(char *arg, const struct fetch_type *t,
 			f->fn = t->fetch[FETCH_MTD_retval];
 		else
 			ret = -EINVAL;
-	} else if (strncmp(arg, "stack", 5) == 0) {
+	} else if (str_has_prefix(arg, "stack")) {
 		if (arg[5] == '\0') {
 			if (strcmp(t->name, DEFAULT_FETCH_TYPE_STR))
 				return -EINVAL;
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 40337094085c..9a4e24d5b8c0 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -453,7 +453,7 @@ static char stack_trace_filter_buf[COMMAND_LINE_SIZE+1] __initdata;
 
 static __init int enable_stacktrace(char *str)
 {
-	if (strncmp(str, "_filter=", 8) == 0)
+	if (str_has_prefix(str, "_filter="))
 		strncpy(stack_trace_filter_buf, str+8, COMMAND_LINE_SIZE);
 
 	stack_tracer_enabled = 1;