diff options
| author |   Marco Elver <elver@google.com> | 2021-11-30 12:44:27 +0100 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2021-12-09 16:42:28 -0800 |
| commit | d93414e37586691dd2684a7f8ed05fb9cd640f83 (patch) | |
| tree | a07c82b559a3fcbfd1463af24c98b834e4935e94 | |
| parent | x86/barriers, kcsan: Use generic instrumentation for non-smp barriers (diff) | |
| download | wireguard-linux-d93414e37586691dd2684a7f8ed05fb9cd640f83.tar.xz wireguard-linux-d93414e37586691dd2684a7f8ed05fb9cd640f83.zip | |
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: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
| -rw-r--r-- | arch/x86/include/asm/qspinlock.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h index d86ab942219c..d87451df480b 100644 --- a/arch/x86/include/asm/qspinlock.h +++ b/arch/x86/include/asm/qspinlock.h @@ -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); } |