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SubjectRe: [PATCH v2 0/4] gpio: fix SRCU bugs
On Wed, Feb 14, 2024 at 9:44 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Here are four fixes to some bugs in recent SRCU changes. The first one fixes
> an actual race condition. The other three just make lockdep happy.
>
> v1 -> v2:
> - use srcu_dereference() instead of rcu_dereference_protected() as
> advised by Paul
> - add a patch using rcu_dereference_check(..., 1) in deprecated
> interfaces that return the address of the RCU-protected chip structure
> to external users (who shouldn't use it anyway but well...)
> - pick up review tags for patches 1/4 and 2/4
>
> Bartosz Golaszewski (4):
> gpio: take the SRCU read lock in gpiod_hog()
> gpio: cdev: use correct pointer accessors with SRCU
> gpio: use srcu_dereference() with SRCU-protected pointers
> gpio: don't let lockdep complain about inherently dangerous RCU usage
>
> drivers/gpio/gpiolib-cdev.c | 25 ++++++++++++-------------
> drivers/gpio/gpiolib-sysfs.c | 5 +++--
> drivers/gpio/gpiolib.c | 32 ++++++++++++++++++--------------
> drivers/gpio/gpiolib.h | 3 ++-
> 4 files changed, 35 insertions(+), 30 deletions(-)
>
> --
> 2.40.1
>

Series queued.

Bart

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