util-lib: introdude _cleanup_ macros for kmod objects

src/modules-load/modules-load.c

@@ -29,6 +29,7 @@
 #include "fd-util.h"
 #include "fileio.h"
 #include "log.h"
+#include "module-util.h"
 #include "proc-cmdline.h"
 #include "string-util.h"
 #include "strv.h"
@@ -77,7 +78,8 @@ static int parse_proc_cmdline_item(const char *key, const char *value, void *dat
 
 static int load_module(struct kmod_ctx *ctx, const char *m) {
         const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
-        struct kmod_list *itr, *modlist = NULL;
+        struct kmod_list *itr;
+        _cleanup_(kmod_module_unref_listp) struct kmod_list *modlist = NULL;
         int r = 0;
 
         log_debug("load: %s", m);
@@ -92,7 +94,7 @@ static int load_module(struct kmod_ctx *ctx, const char *m) {
         }
 
         kmod_list_foreach(itr, modlist) {
-                struct kmod_module *mod;
+                _cleanup_(kmod_module_unrefp) struct kmod_module *mod = NULL;
                 int state, err;
 
                 mod = kmod_module_get_module(itr);
@@ -120,12 +122,8 @@ static int load_module(struct kmod_ctx *ctx, const char *m) {
                                 r = err;
                         }
                 }
-
-                kmod_module_unref(mod);
         }
 
-        kmod_module_unref_list(modlist);
-
         return r;
 }
 
@@ -218,7 +216,7 @@ static int parse_argv(int argc, char *argv[]) {
 
 int main(int argc, char *argv[]) {
         int r, k;
-        struct kmod_ctx *ctx;
+        _cleanup_(kmod_unrefp) struct kmod_ctx *ctx = NULL;
 
         r = parse_argv(argc, argv);
         if (r <= 0)
@@ -280,7 +278,6 @@ int main(int argc, char *argv[]) {
         }
 
 finish:
-        kmod_unref(ctx);
         strv_free(arg_proc_cmdline_modules);
 
         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;