[PATCH v2 0/4] gpio: fix SRCU bugs

[Bartosz Golaszewski <brgl@xxxxxxxx>]

From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

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