From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

This function is a wrapper around container_of(). It's used only once and
we will have a second notifier soon, so instead of having two flavors of
this helper, let's just open-code where needed.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpiolib-cdev.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 9ee8604f32e1..df30d17f9e29 100644
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -2491,16 +2491,12 @@ static long gpio_ioctl_compat(struct file *file, unsigned int cmd,
 }
 #endif
 
-static struct gpio_chardev_data *
-to_gpio_chardev_data(struct notifier_block *nb)
-{
-	return container_of(nb, struct gpio_chardev_data, lineinfo_changed_nb);
-}
-
 static int lineinfo_changed_notify(struct notifier_block *nb,
 				   unsigned long action, void *data)
 {
-	struct gpio_chardev_data *cdev = to_gpio_chardev_data(nb);
+	struct gpio_chardev_data *cdev = container_of(nb,
+						      struct gpio_chardev_data,
+						      lineinfo_changed_nb);
 	struct gpio_v2_line_info_changed chg;
 	struct gpio_desc *desc = data;
 	int ret;
-- 
2.39.2

On Thu, Aug 17, 2023 at 08:49:54PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> This function is a wrapper around container_of(). It's used only once and
> we will have a second notifier soon, so instead of having two flavors of
> this helper, let's just open-code where needed.

...

> +	struct gpio_chardev_data *cdev = container_of(nb,
> +						      struct gpio_chardev_data,
> +						      lineinfo_changed_nb);

This way it's slightly better.

	struct gpio_chardev_data *cdev =
		container_of(nb, struct gpio_chardev_data, lineinfo_changed_nb);

-- 
With Best Regards,
Andy Shevchenko