[PATCH v2 11/16] rcu: Mark the Tiny RCU rcu_is_watching() notrace

[Song Liu]

ftrace_test_recursion_trylock() calls rcu_is_watching() before it has
taken the recursion lock. The Tree RCU version is a notrace function,
but the Tiny RCU version is a plain inline function. An out-of-line copy
of it is untraced only because inline implies notrace.

Mark it notrace explicitly. No functional change.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Song Liu <song@xxxxxxxxxx>
---
 include/linux/rcutiny.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index f519cd680228..2a61d17e0e4e 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -127,7 +127,7 @@ static inline void rcu_preempt_deferred_qs(struct task_struct *t) { }
 void rcu_scheduler_starting(void);
 static inline void rcu_end_inkernel_boot(void) { }
 static inline bool rcu_inkernel_boot_has_ended(void) { return true; }
-static inline bool rcu_is_watching(void) { return true; }
+static inline bool notrace rcu_is_watching(void) { return true; }
 static inline void rcu_momentary_eqs(void) { }
 
 /* Avoid RCU read-side critical sections leaking across. */
-- 
2.53.0-Meta