kcsan: Add Kernel Concurrency Sanitizer infrastructure
Kernel Concurrency Sanitizer (KCSAN) is a dynamic data-race detector for
kernel space. KCSAN is a sampling watchpoint-based data-race detector.
See the included Documentation/dev-tools/kcsan.rst for more details.
This patch adds basic infrastructure, but does not yet enable KCSAN for
any architecture.
Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
diff --git a/init/init_task.c b/init/init_task.c
index 9e5cbe5..2b4fe98 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -161,6 +161,14 @@ struct task_struct init_task
#ifdef CONFIG_KASAN
.kasan_depth = 1,
#endif
+#ifdef CONFIG_KCSAN
+ .kcsan_ctx = {
+ .disable_count = 0,
+ .atomic_next = 0,
+ .atomic_nest_count = 0,
+ .in_flat_atomic = false,
+ },
+#endif
#ifdef CONFIG_TRACE_IRQFLAGS
.softirqs_enabled = 1,
#endif