From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 2 Sep 2021 20:00:15 +0000 (-0700)
Subject: Merge tag 'locking-debug-2021-09-01' of git://git.kernel.org/pub/scm/linux/kernel... 
X-Git-Tag: accepted/tizen/unified/20230118.172025~6489
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aa829778b16f15266fefe2640f04931b16ce39c0;p=platform%2Fkernel%2Flinux-rpi.git

Merge tag 'locking-debug-2021-09-01' of git://git./linux/kernel/git/tip/tip

Pull memory model updates from Ingo Molnar:
 "LKMM updates:

   - Update documentation and code example

  KCSAN updates:

   - Introduce CONFIG_KCSAN_STRICT (which RCU uses)

   - Optimize use of get_ctx() by kcsan_found_watchpoint()

   - Rework atomic.h into permissive.h

   - Add the ability to ignore writes that change only one bit of a
     given data-racy variable.

   - Improve comments"

* tag 'locking-debug-2021-09-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tools/memory-model: Document data_race(READ_ONCE())
  tools/memory-model: Heuristics using data_race() must handle all values
  tools/memory-model: Add example for heuristic lockless reads
  tools/memory-model: Make read_foo_diagnostic() more clearly diagnostic
  kcsan: Make strict mode imply interruptible watchers
  kcsan: permissive: Ignore data-racy 1-bit value changes
  kcsan: Print if strict or non-strict during init
  kcsan: Rework atomic.h into permissive.h
  kcsan: Reduce get_ctx() uses in kcsan_found_watchpoint()
  kcsan: Introduce CONFIG_KCSAN_STRICT
  kcsan: Remove CONFIG_KCSAN_DEBUG
  kcsan: Improve some Kconfig comments
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aa829778b16f15266fefe2640f04931b16ce39c0