[PATCH] exit: document sched_process_exit and sched_process_template relation

[Andrii Nakryiko]

Add an explicit note pointing out that sched_process_exit tracepoint is,
conceptually, related to sched_process_template and should be kept in
sync (though, on the best effort basis).

This is a follow-up to [0], and can hopefully be just folded in when applying.

  [0] https://lore.kernel.org/linux-trace-kernel/20250402180925.90914-1-andrii@xxxxxxxxxx/

Suggested-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
 include/trace/events/sched.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 05a14f2b35c3..3bec9fb73a36 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -326,7 +326,11 @@ DEFINE_EVENT(sched_process_template, sched_process_free,
 	     TP_ARGS(p));
 
 /*
- * Tracepoint for a task exiting:
+ * Tracepoint for a task exiting.
+ * Note, it's a superset of sched_process_template and should be kept
+ * compatible as much as possible. sched_process_exits has an extra
+ * `group_dead` argument, so sched_process_template can't be used,
+ * unfortunately, just like sched_migrate_task above.
  */
 TRACE_EVENT(sched_process_exit,
 
-- 
2.47.1