diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-01-05 20:42:44 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-12 10:51:29 +0100 |
| commit | 47d8b4c1d868148c8fb51b785a89e58ca2d02c4d (patch) | |
| tree | 6d5415669bf65cdd09feaed8ec46053de68e4721 /drivers/gpio/gpiolib.h | |
| parent | 8a5b477bb3e9c891eb064accabb3162ccf2c590e (diff) | |
gpio: add SRCU infrastructure to struct gpio_device
Add the SRCU struct to GPIO device. It will be used to serialize access
to the GPIO chip pointer. 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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 43ff4931e2c3..35d71e30c546 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -49,6 +49,7 @@ * @sem: protects the structure from a NULL-pointer dereference of @chip by * user-space operations when the device gets unregistered during * a hot-unplug event + * @srcu: protects the pointer to the underlying GPIO chip * @pin_ranges: range of pins served by the GPIO driver * * This state container holds most of the runtime variable data @@ -73,6 +74,7 @@ struct gpio_device { struct blocking_notifier_head line_state_notifier; struct blocking_notifier_head device_notifier; struct rw_semaphore sem; + struct srcu_struct srcu; #ifdef CONFIG_PINCTRL /* |