diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-14 11:44:18 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-15 10:39:25 +0300 |
| commit | d82b9e0887e69d9060c854b079a3a5024788f7cb (patch) | |
| tree | 56e73a4e1f84fa9c59de78ae222fc44cef080136 /drivers/gpio/gpiolib.h | |
| parent | 8574b5b47610df22048adcdabf318ca983024f28 (diff) | |
| download | linux-d82b9e0887e69d9060c854b079a3a5024788f7cb.tar.xz | |
gpio: use srcu_dereference() with SRCU-protected pointers
Lockdep with CONFIG_PROVE_RCU enabled reports false positives about
suspicious rcu_dereference() usage. Let's silence it by using
srcu_dereference() which is the correct helper with SRCU.
Fixes: d83cee3d2bb1 ("gpio: protect the pointer to gpio_chip in gpio_device with SRCU")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202402122234.d85cca9b-lkp@intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 07443d26cbca..ada36aa0f81a 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -202,7 +202,8 @@ DEFINE_CLASS(gpio_chip_guard, _guard.gdev = desc->gdev; _guard.idx = srcu_read_lock(&_guard.gdev->srcu); - _guard.gc = rcu_dereference(_guard.gdev->chip); + _guard.gc = srcu_dereference(_guard.gdev->chip, + &_guard.gdev->srcu); _guard; }), |