dyndbg: cleanup auto vars in dynamic_debug_init

rework var-names for clarity, regularity
rename variables
  - n to mod_sites - it counts sites-per-module
  - entries to i - display only
  - iter_start to iter_mod_start - marks start of each module's subrange
  - modct to mod_ct - stylistic

new iterator var:
  - site - cursor parallel to iter
    1st step towards 'demotion' of iter->site, for removal later

treat vars as iters:
  - drop init at top
    init just above for-loop, in a textual block
Acked-by: Jason Baron <jbaron@akamai.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20220904214134.408619-11-jim.cromie@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

lib/dynamic_debug.c

@@ -1059,11 +1059,10 @@ static int __init dynamic_debug_init_control(void)
 
 static int __init dynamic_debug_init(void)
 {
-	struct _ddebug *iter, *iter_start;
-	const char *modname = NULL;
+	struct _ddebug *iter, *iter_mod_start;
+	int ret, i, mod_sites, mod_ct;
+	const char *modname;
 	char *cmdline;
-	int ret = 0;
-	int n = 0, entries = 0, modct = 0;
 
 	if (&__start___dyndbg == &__stop___dyndbg) {
 		if (IS_ENABLED(CONFIG_DYNAMIC_DEBUG)) {
@@ -1074,30 +1073,32 @@ static int __init dynamic_debug_init(void)
 		ddebug_init_success = 1;
 		return 0;
 	}
-	iter = __start___dyndbg;
+
+	iter = iter_mod_start = __start___dyndbg;
 	modname = iter->modname;
-	iter_start = iter;
-	for (; iter < __stop___dyndbg; iter++) {
-		entries++;
+	i = mod_sites = mod_ct = 0;
+
+	for (; iter < __stop___dyndbg; iter++, i++, mod_sites++) {
+
 		if (strcmp(modname, iter->modname)) {
-			modct++;
-			ret = ddebug_add_module(iter_start, n, modname);
+			mod_ct++;
+			ret = ddebug_add_module(iter_mod_start, mod_sites, modname);
 			if (ret)
 				goto out_err;
-			n = 0;
+
+			mod_sites = 0;
 			modname = iter->modname;
-			iter_start = iter;
+			iter_mod_start = iter;
 		}
-		n++;
 	}
-	ret = ddebug_add_module(iter_start, n, modname);
+	ret = ddebug_add_module(iter_mod_start, mod_sites, modname);
 	if (ret)
 		goto out_err;
 
 	ddebug_init_success = 1;
 	vpr_info("%d prdebugs in %d modules, %d KiB in ddebug tables, %d kiB in __dyndbg section\n",
-		 entries, modct, (int)((modct * sizeof(struct ddebug_table)) >> 10),
-		 (int)((entries * sizeof(struct _ddebug)) >> 10));
+		 i, mod_ct, (int)((mod_ct * sizeof(struct ddebug_table)) >> 10),
+		 (int)((i * sizeof(struct _ddebug)) >> 10));
 
 	/* now that ddebug tables are loaded, process all boot args
 	 * again to find and activate queries given in dyndbg params.