github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 09:36:22 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

gpiolib: Mark gpio_devt, gpiolib_initialized and gpio_stub_drv as __ro_after_init

Browse Source 
The 'gpio_devt' and 'gpiolib_initialized' variables are initialized only
during the init phase in the 'gpiolib_dev_init' function and never
changed. So, mark these as __ro_after_init.

The 'gpio_stub_drv' variable is initialized only in the declaration and
never changed. So, this variable could be 'const', but using the
'driver_register' and 'driver_unregister' functions discards the 'const'
qualifier. Therefore, as an alternative, mark it as a __ro_after_init.

Signed-off-by: Len Bao <len.bao@gmx.us>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260516105737.45174-1-len.bao@gmx.us
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
This commit is contained in:
Len Bao 2026-05-16 10:57:34 +00:00 committed by Bartosz Golaszewski
parent 820017813b
commit b12e12ee41
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpio/gpiolib.c
View File

@ -55,7 +55,7 @@
/* Device and char device-related information */
static DEFINE_IDA(gpio_ida);
static dev_t gpio_devt;
static dev_t gpio_devt __ro_after_init;
#define GPIO_DEV_MAX 256 /* 256 GPIO chip devices supported */
static int gpio_bus_match(struct device *dev, const struct device_driver *drv)
@ -114,7 +114,7 @@ static int gpiochip_irqchip_init_hw(struct gpio_chip *gc);
static int gpiochip_irqchip_init_valid_mask(struct gpio_chip *gc);
static void gpiochip_irqchip_free_valid_mask(struct gpio_chip *gc);
static bool gpiolib_initialized;
static bool gpiolib_initialized __ro_after_init;
const char *gpiod_get_label(struct gpio_desc *desc)
{
@ -5362,7 +5362,7 @@ EXPORT_SYMBOL_GPL(gpiod_put_array);
* gpio_device of the GPIO chip with the firmware node and then simply
* bind it to this stub driver.
*/
static struct device_driver gpio_stub_drv = {
static struct device_driver gpio_stub_drv __ro_after_init = {
.name = "gpio_stub_drv",
.bus = &gpio_bus_type,
};