diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index f375483..8803a69 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -176,16 +176,13 @@
 	return false;
 }
 
-bool is_kernel_module(const char *pathname, bool *compressed)
+bool is_kernel_module(const char *pathname)
 {
 	struct kmod_path m;
 
 	if (kmod_path__parse(&m, pathname))
 		return NULL;
 
-	if (compressed)
-		*compressed = m.comp;
-
 	return m.kmod;
 }
 
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 3c81d83..54dd03a49 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -191,7 +191,7 @@
 				   char *root_dir, char *filename, size_t size);
 bool is_supported_compression(const char *ext);
 bool is_kmodule_extension(const char *ext);
-bool is_kernel_module(const char *pathname, bool *compressed);
+bool is_kernel_module(const char *pathname);
 bool decompress_to_file(const char *ext, const char *filename, int output_fd);
 bool dso__needs_decompress(struct dso *dso);
 
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 1f407f7..fb43215 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1266,7 +1266,7 @@
 
 		dso__set_build_id(dso, &bev->build_id);
 
-		if (!is_kernel_module(filename, NULL))
+		if (!is_kernel_module(filename))
 			dso->kernel = dso_type;
 
 		build_id__sprintf(dso->build_id, sizeof(dso->build_id),
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 6ca61a3..1de5438 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1104,7 +1104,7 @@
 		struct dso *dso;
 
 		list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
-			if (is_kernel_module(dso->long_name, NULL))
+			if (is_kernel_module(dso->long_name))
 				continue;
 
 			kernel = dso;