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lkmm: Upgrade LKMM documentation

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This commit upgrades LKMM documentation, perhaps most notably adding
 a number of litmus tests illustrating cmpxchg() ordering properties.
 TL;DR: Failing cmpxchg() operations provide no ordering.
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Merge tag 'lkmm.2024.05.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

Pull LKMM documentation updates from Paul McKenney:
 "This upgrades LKMM documentation, perhaps most notably adding a number
  of litmus tests illustrating cmpxchg() ordering properties.

  TL;DR: Failing cmpxchg() operations provide no ordering"

* tag 'lkmm.2024.05.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
  Documentation/litmus-tests: Make cmpxchg() tests safe for klitmus
  Documentation/atomic_t: Emphasize that failed atomic operations give no ordering
  Documentation/litmus-tests: Demonstrate unordered failing cmpxchg
  Documentation/litmus-tests: Add locking tests to README
This commit is contained in:
Linus Torvalds 2024-05-13 10:10:19 -07:00
commit ee20260136
6 changed files with 176 additions and 2 deletions
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