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locking/barriers, kcsan: Add instrumentation for barriers

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Adds the required KCSAN instrumentation for barriers if CONFIG_SMP.
KCSAN supports modeling the effects of:

	smp_mb()
	smp_rmb()
	smp_wmb()
	smp_store_release()

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Marco Elver 2021-11-30 12:44:22 +01:00 • committed by Paul E. McKenney
parent 71b0e3aeb2
commit f948666de5
2 changed files with 16 additions and 15 deletions
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2
include/linux/spinlock.h
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@ -171,7 +171,7 @@ do { \
* Architectures that can implement ACQUIRE better need to take care.
*/
#ifndef smp_mb__after_spinlock
#define smp_mb__after_spinlock() do { } while (0)
#define smp_mb__after_spinlock() kcsan_mb()
#endif
#ifdef CONFIG_DEBUG_SPINLOCK