proc-cmdline: make proc_cmdline_parse_given() static

It is used only in proc-cmdline.c and its test. And the test can be
covered by proc_cmdline_parse().

src/basic/proc-cmdline.c

@@ -79,7 +79,7 @@ static int proc_cmdline_extract_first(const char **p, char **ret_word, ProcCmdli
         return 0;
 }
 
-int proc_cmdline_parse_given(const char *line, proc_cmdline_parse_t parse_item, void *data, ProcCmdlineFlags flags) {
+static int proc_cmdline_parse_given(const char *line, proc_cmdline_parse_t parse_item, void *data, ProcCmdlineFlags flags) {
         const char *p;
         int r;
 

src/basic/proc-cmdline.h

@@ -16,7 +16,6 @@ typedef int (*proc_cmdline_parse_t)(const char *key, const char *value, void *da
 
 int proc_cmdline(char **ret);
 
-int proc_cmdline_parse_given(const char *line, proc_cmdline_parse_t parse_item, void *data, ProcCmdlineFlags flags);
 int proc_cmdline_parse(const proc_cmdline_parse_t parse, void *userdata, ProcCmdlineFlags flags);
 
 int proc_cmdline_get_key(const char *parameter, ProcCmdlineFlags flags, char **value);

src/test/test-proc-cmdline.c

@@ -90,17 +90,17 @@ static void test_proc_cmdline_given_one(bool flip_initrd) {
                 in_initrd_force(!in_initrd());
 
         bool t = true, f = false;
-        assert_se(proc_cmdline_parse_given("foo_bar=quux wuff-piep=\"tuet \" rd.zumm space='x y z' miepf=\"uuu\"",
-                                           parse_item_given, &t, PROC_CMDLINE_STRIP_RD_PREFIX) >= 0);
-
-        assert_se(proc_cmdline_parse_given("foo_bar=quux wuff-piep=\"tuet \" rd.zumm space='x y z' miepf=\"uuu\"",
-                                           parse_item_given, &f, 0) >= 0);
+        assert_se(proc_cmdline_parse(parse_item_given, &t, PROC_CMDLINE_STRIP_RD_PREFIX) >= 0);
+        assert_se(proc_cmdline_parse(parse_item_given, &f, 0) >= 0);
 
         if (flip_initrd)
                 in_initrd_force(!in_initrd());
 }
 
 TEST(test_proc_cmdline_given) {
+        assert_se(putenv((char*) "SYSTEMD_PROC_CMDLINE=foo_bar=quux wuff-piep=\"tuet \" rd.zumm space='x y z' miepf=\"uuu\"") == 0);
+        assert_se(putenv((char*) "SYSTEMD_EFI_OPTIONS=miepf=\"uuu\"") == 0);
+
         test_proc_cmdline_given_one(false);
         /* Repeat the same thing, but now flip our ininitrdness */
         test_proc_cmdline_given_one(true);