[PATCH 3/5] gpiolib: add support for scope-based management of GPIO descriptors

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

Add DEFINE_FREE() definitions for gpiod_put and gpiod_put_array to
allow using __free(gpiod_put) and __free(gpiod_put_array) for automatic,
scope-based cleanup of individual GPIO descriptors and descriptor
arrays. Place these definitions after the CONFIG_GPIOLIB check so that
they are available regardless of whether CONFIG_GPIOLIB is enabled.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 include/linux/gpio/consumer.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index fceeefd5f893..ee183a97575c 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -3,6 +3,7 @@
 #define __LINUX_GPIO_CONSUMER_H
 
 #include <linux/bits.h>
+#include <linux/cleanup.h>
 #include <linux/err.h>
 #include <linux/types.h>
 
@@ -578,6 +579,9 @@ gpiod_is_equal(const struct gpio_desc *desc, const struct gpio_desc *other)
 
 #endif /* CONFIG_GPIOLIB */
 
+DEFINE_FREE(gpiod_put, struct gpio_desc *, if (!IS_ERR_OR_NULL(_T)) gpiod_put(_T))
+DEFINE_FREE(gpiod_put_array, struct gpio_descs *, if (!IS_ERR_OR_NULL(_T)) gpiod_put_array(_T))
+
 #if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_HTE)
 int gpiod_enable_hw_timestamp_ns(struct gpio_desc *desc, unsigned long flags);
 int gpiod_disable_hw_timestamp_ns(struct gpio_desc *desc, unsigned long flags);
-- 
2.56.0.307.g5fe7bd680c-goog