This will let us sprinkle sanity checks around the kernel without
making too much of a mess.
Signed-off-by: Andy Lutomirski <l...@kernel.org>
---
include/linux/context_tracking.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h
index 2821838256b4..0fbea4b152e1 100644
--- a/include/linux/context_tracking.h
+++ b/include/linux/context_tracking.h
@@ -57,6 +57,13 @@ static inline void context_tracking_task_switch(struct
task_struct *prev,
if (context_tracking_is_enabled())
__context_tracking_task_switch(prev, next);
}
+
+static inline void context_tracking_assert_state(enum ctx_state state)
+{
+ rcu_lockdep_assert(!context_tracking_is_enabled() ||
+ this_cpu_read(context_tracking.state) == state,
+ "context tracking state was wrong");
+}
#else
static inline void user_enter(void) { }
static inline void user_exit(void) { }
@@ -64,6 +71,7 @@ static inline enum ctx_state exception_enter(void) { return
0; }
static inline void exception_exit(enum ctx_state prev_ctx) { }
static inline void context_tracking_task_switch(struct task_struct *prev,
struct task_struct *next) { }
+static inline void context_tracking_assert_state(enum ctx_state state) { }
#endif /* !CONFIG_CONTEXT_TRACKING */
--
2.4.3
--
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