Merge tag 'gpio-fixes-for-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:
 "Some last-minute fixes for this release from the GPIO subsystem.

  The first two address a regression in performance reported to me after
  the conversion to using SRCU in GPIOLIB that was merged during the
  v6.9 merge window. The second patch is not technically a fix but since
  after the first one we no longer need to use a per-descriptor SRCU
  struct, I think it's worth to simplify the code before it gets
  released on Sunday.

  The next two commits fix two memory issues: one use-after-free bug and
  one instance of possibly leaking kernel stack memory to user-space.

  Summary:

   - fix a performance regression in GPIO requesting and releasing after
     the conversion to SRCU

   - fix a use-after-free bug due to a race-condition

   - fix leaking stack memory to user-space in a GPIO uABI corner case"

* tag 'gpio-fixes-for-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: cdev: fix uninitialised kfifo
  gpiolib: cdev: Fix use after free in lineinfo_changed_notify
  gpiolib: use a single SRCU struct for all GPIO descriptors
  gpiolib: fix the speed of descriptor label setting with SRCU

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