gpio: always compile label support

Compiling out GPIO labels results in a space gain so small that it can
hardly be justified. Labels can also be useful for printing debug
messages, so always keep them around.

Signed-off-by: Alexandre Courbot <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpiolib.c

···
 #define GPIO_FLAGS_MASK		((1 << ID_SHIFT) - 1)
 #define GPIO_TRIGGER_MASK	(BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE))
 
-#ifdef CONFIG_DEBUG_FS
 	const char		*label;
-#endif
 };
 static struct gpio_desc gpio_desc[ARCH_NR_GPIOS];
 
···
 
 /* With descriptor prefix */
 
-#ifdef CONFIG_DEBUG_FS
 #define gpiod_emerg(desc, fmt, ...)					       \
 	pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
                  ##__VA_ARGS__)
···
 #define gpiod_dbg(desc, fmt, ...)					       \
 	pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
                  ##__VA_ARGS__)
-#else
-#define gpiod_emerg(desc, fmt, ...)					\
-	pr_emerg("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_crit(desc, fmt, ...)					\
-	pr_crit("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_err(desc, fmt, ...)					\
-	pr_err("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_warn(desc, fmt, ...)					\
-	pr_warn("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_info(desc, fmt, ...)					\
-	pr_info("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#define gpiod_dbg(desc, fmt, ...)					\
-	pr_debug("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
-#endif
 
 /* With chip prefix */
 
···
 
 static inline void desc_set_label(struct gpio_desc *d, const char *label)
 {
-#ifdef CONFIG_DEBUG_FS
 	d->label = label;
-#endif
 }
 
 /*
···
  * @offset: of signal within controller's 0..(ngpio - 1) range
  *
  * Returns NULL if the GPIO is not currently requested, else a string.
- * If debugfs support is enabled, the string returned is the label passed
- * to gpio_request(); otherwise it is a meaningless constant.
+ * The string returned is the label passed to gpio_request(); if none has been
+ * passed it is a meaningless, non-NULL constant.
  *
  * This function is for use by GPIO controller drivers.  The label can
  * help with diagnostics, and knowing that the signal is used as a GPIO
···
 
 	if (test_bit(FLAG_REQUESTED, &desc->flags) == 0)
 		return NULL;
-#ifdef CONFIG_DEBUG_FS
 	return desc->label;
-#else
-	return "?";
-#endif
 }
 EXPORT_SYMBOL_GPL(gpiochip_is_requested);