kcsan: Add kcsan_set_access_mask() support
When setting up an access mask with kcsan_set_access_mask(), KCSAN will
only report races if concurrent changes to bits set in access_mask are
observed. Conveying access_mask via a separate call avoids introducing
overhead in the common-case fast-path.
Acked-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/init/init_task.c b/init/init_task.c
index 2b4fe98..096191d 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -167,6 +167,7 @@ struct task_struct init_task
.atomic_next = 0,
.atomic_nest_count = 0,
.in_flat_atomic = false,
+ .access_mask = 0,
},
#endif
#ifdef CONFIG_TRACE_IRQFLAGS