diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-01-05 15:46:27 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-12 10:50:37 +0100 |
| commit | be711caa87c5c81d5dc00b244cac3a0b775adb18 (patch) | |
| tree | 04c8e14427071805e5e76ad183328519fe728b38 /drivers/gpio/gpiolib.h | |
| parent | ccfb6ff4f6c0574e01fb16934fb60a46285c5f3f (diff) | |
gpio: add SRCU infrastructure to struct gpio_desc
Extend the GPIO descriptor with an SRCU structure in order to serialize
the access to the label. Initialize and clean it up where applicable.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 1058f326fe2b..6e14b629c48b 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -17,6 +17,7 @@ #include <linux/module.h> #include <linux/notifier.h> #include <linux/rwsem.h> +#include <linux/srcu.h> #define GPIOCHIP_NAME "gpiochip" @@ -147,6 +148,7 @@ void gpiod_line_state_notify(struct gpio_desc *desc, unsigned long action); * @label: Name of the consumer * @name: Line name * @hog: Pointer to the device node that hogs this line (if any) + * @srcu: SRCU struct protecting the label pointer. * * These are obtained using gpiod_get() and are preferable to the old * integer-based handles. @@ -184,6 +186,7 @@ struct gpio_desc { #ifdef CONFIG_OF_DYNAMIC struct device_node *hog; #endif + struct srcu_struct srcu; }; #define gpiod_not_found(desc) (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT) |