Commit d93414e3 authored by Marco Elver's avatar Marco Elver Committed by Paul E. McKenney
Browse files

x86/qspinlock, kcsan: Instrument barrier of pv_queued_spin_unlock() 



If CONFIG_PARAVIRT_SPINLOCKS=y, queued_spin_unlock() is implemented
using pv_queued_spin_unlock() which is entirely inline asm based. As
such, we do not receive any KCSAN barrier instrumentation via regular
atomic operations.

Add the missing KCSAN barrier instrumentation for the
CONFIG_PARAVIRT_SPINLOCKS case.

Signed-off-by: default avatarMarco Elver <elver@google.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent cd8730c3

arch/x86/include/asm/qspinlock.h

+1 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ static inline void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val) 


static inline void queued_spin_unlock(struct qspinlock *lock)

{

	kcsan_release();

	pv_queued_spin_unlock(lock);

}