diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index f37548322c9debe2218bb538f1758585f440a797..8803a69fc260b9b663fba01b08ce26d622c4e28c 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -176,16 +176,13 @@ bool is_kmodule_extension(const char *ext)
 	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 3c81d8378bc749157047162853c5e0e076bea4c0..54dd03a490ce9e05fbb2a9a519528d102e87fc71 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -191,7 +191,7 @@ int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type t
 				   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 1f407f7352a7fd2bab67ad13e63e5fcd053495ba..fb432153e2aa33d7eb4862c434bd69fe069d9861 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1266,7 +1266,7 @@ static int __event_process_build_id(struct build_id_event *bev,
 
 		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 6ca61a3427a61e62d59f2e0e874f9714143e9f43..1de5438ad0700206e8b8eb9064cfce4f4ee24903 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1104,7 +1104,7 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
 		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;