# \[PATCH v3 5/9\] rv/ha: make da\_monitor\_reset\_hook and EVENT\_NONE\_LBL overridable

- From: \<hidden\>
- Date: 2026-06-07 16:14:43 
- List: linux-trace-kernel
- Page: https://ratatoskr.run/linux-trace-kernel/2026/06/17099741
- Thread: https://ratatoskr.run/linux-trace-kernel/2026/06/17099738/t.md

```text
From: Wen Yang <redacted>

Wrap the two definitions with #ifndef guards so that HA-based monitors
can substitute their own implementations before including this header:

  /* in monitor.c, before #include <rv/ha_monitor.h> */
  #define da_monitor_reset_hook  my_monitor_reset_env
  #define EVENT_NONE_LBL         "idle"

No behaviour change for monitors that do not override either macro.

Signed-off-by: Wen Yang <redacted>
---
 include/rv/ha_monitor.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/rv/ha_monitor.h b/include/rv/ha_monitor.h
index e5860900a337..610da54c111f 100644
--- a/include/rv/ha_monitor.h
+++ b/include/rv/ha_monitor.h
@@ -36,7 +36,10 @@ static bool ha_monitor_handle_constraint(struct da_monitor *da_mon,
 					 da_id_type id);
 #define da_monitor_event_hook ha_monitor_handle_constraint
 #define da_monitor_init_hook ha_monitor_init_env
+/* Allow monitors to override da_monitor_reset_hook before including this header. */
+#ifndef da_monitor_reset_hook
 #define da_monitor_reset_hook ha_monitor_reset_env
+#endif
 #define da_monitor_sync_hook() synchronize_rcu()
 
 #if !defined(HA_SKIP_AUTO_CLEANUP) && RV_MON_TYPE == RV_MON_PER_TASK
@@ -75,7 +78,9 @@ _Static_assert(offsetof(struct ha_monitor, da_mon) == 0,
 #define ENV_INVALID_VALUE U64_MAX
 /* Error with no event occurs only on timeouts */
 #define EVENT_NONE EVENT_MAX
+#ifndef EVENT_NONE_LBL
 #define EVENT_NONE_LBL "none"
+#endif
 #define ENV_BUFFER_SIZE 64
 
 #ifdef CONFIG_RV_REACTORS
-- 
2.43.0

```