---
- branch: MAIN
  date: Sun Dec 19 01:18:02 UTC 2021
  files:
  - new: '1.9'
    old: '1.8'
    path: src/sys/external/bsd/drm2/include/linux/rcupdate.h
    pathrev: src/sys/external/bsd/drm2/include/linux/rcupdate.h@1.9
    type: modified
  id: 20211219T011802Z.4a96d4a756a63dac71e3cfb074673fbe14ff07bd
  log: |
    RCU pointer fixes.

    - Use __typeof__, not typeof.
    - Use membar_exit, not membar_producer.
      => We want a store-release, not store/store barrier.
      => Consider:
           foo->x = 42;
           assert(foo->x == 42);
           rcu_assign_pointer(globalfoo, foo);
         The foo->x load can be reordered past the store/store barrier
         (membar_producer), and happen after another thread has clobbered
         foo->x.
    - Put the evaluation of the right-hand side before the barrier.
  module: src
  subject: 'CVS commit: src/sys/external/bsd/drm2/include/linux'
  unixtime: '1639876682'
  user: riastradh