lib/stackdepot: rename stack_depot_disable

Rename stack_depot_disable to stack_depot_disabled to make its name look
similar to the names of other stack depot flags.

Also put stack_depot_disabled's definition together with the other flags.

Also rename is_stack_depot_disabled to disable_stack_depot: this name
looks more conventional for a function that processes a boot parameter.

No functional changes.

Link: https://lkml.kernel.org/r/d78a07d222e689926e5ead229e4a2e3d87dc9aa7.1676063693.git.andreyknvl@google.comSigned-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/stackdepot.c

@@ -71,6 +71,7 @@ struct stack_record {
 	unsigned long entries[];	/* Variable-sized array of entries. */
 };
 
+static bool stack_depot_disabled;
 static bool __stack_depot_early_init_requested __initdata = IS_ENABLED(CONFIG_STACKDEPOT_ALWAYS_INIT);
 static bool __stack_depot_early_init_passed __initdata;
 
@@ -91,21 +92,20 @@ static DEFINE_RAW_SPINLOCK(depot_lock);
 static unsigned int stack_hash_order;
 static unsigned int stack_hash_mask;
 
-static bool stack_depot_disable;
 static struct stack_record **stack_table;
 
-static int __init is_stack_depot_disabled(char *str)
+static int __init disable_stack_depot(char *str)
 {
 	int ret;
 
-	ret = kstrtobool(str, &stack_depot_disable);
-	if (!ret && stack_depot_disable) {
+	ret = kstrtobool(str, &stack_depot_disabled);
+	if (!ret && stack_depot_disabled) {
 		pr_info("disabled\n");
 		stack_table = NULL;
 	}
 	return 0;
 }
-early_param("stack_depot_disable", is_stack_depot_disabled);
+early_param("stack_depot_disable", disable_stack_depot);
 
 void __init stack_depot_request_early_init(void)
 {
@@ -128,7 +128,7 @@ int __init stack_depot_early_init(void)
 	if (kasan_enabled() && !stack_hash_order)
 		stack_hash_order = STACK_HASH_ORDER_MAX;
 
-	if (!__stack_depot_early_init_requested || stack_depot_disable)
+	if (!__stack_depot_early_init_requested || stack_depot_disabled)
 		return 0;
 
 	if (stack_hash_order)
@@ -145,7 +145,7 @@ int __init stack_depot_early_init(void)
 
 	if (!stack_table) {
 		pr_err("hash table allocation failed, disabling\n");
-		stack_depot_disable = true;
+		stack_depot_disabled = true;
 		return -ENOMEM;
 	}
 
@@ -158,7 +158,7 @@ int stack_depot_init(void)
 	int ret = 0;
 
 	mutex_lock(&stack_depot_init_mutex);
-	if (!stack_depot_disable && !stack_table) {
+	if (!stack_depot_disabled && !stack_table) {
 		unsigned long entries;
 		int scale = STACK_HASH_SCALE;
 
@@ -184,7 +184,7 @@ int stack_depot_init(void)
 		stack_table = kvcalloc(entries, sizeof(struct stack_record *), GFP_KERNEL);
 		if (!stack_table) {
 			pr_err("hash table allocation failed, disabling\n");
-			stack_depot_disable = true;
+			stack_depot_disabled = true;
 			ret = -ENOMEM;
 		}
 		stack_hash_mask = entries - 1;
@@ -353,7 +353,7 @@ depot_stack_handle_t __stack_depot_save(unsigned long *entries,
 	 */
 	nr_entries = filter_irq_stacks(entries, nr_entries);
 
-	if (unlikely(nr_entries == 0) || stack_depot_disable)
+	if (unlikely(nr_entries == 0) || stack_depot_disabled)
 		goto fast_exit;
 
 	hash = hash_stack(entries, nr_entries);