[PATCH v3 07/17] rv: Add KUnit stub to rv_react() and rv_*_task_monitor_slot()
From: Gabriele Monaco <gmonaco@redhat.com>
Date: 2026-06-25 12:15:29
Also in:
lkml
Subsystem:
runtime verification (rv), the rest, tracing · Maintainers:
Steven Rostedt, Gabriele Monaco, Linus Torvalds, Masami Hiramatsu
Add KUNIT_STATIC_STUB_REDIRECT to allow those functions to be stubbed in
a KUnit test. This is useful to catch reaction without creating a custom
reactor and going through the effort of setting it from a test.
rv_{get/put}_task_monitor_slot() rely on a lock, but this isn't
necessary during a unit test, so simply skip the calls.
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
---
kernel/trace/rv/rv.c | 5 +++++
kernel/trace/rv/rv_reactors.c | 7 +++++++
2 files changed, 12 insertions(+)
diff --git a/kernel/trace/rv/rv.c b/kernel/trace/rv/rv.c
index ee4e68102f..f59385a24f 100644
--- a/kernel/trace/rv/rv.c
+++ b/kernel/trace/rv/rv.c@@ -142,6 +142,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> +#include <kunit/static_stub.h> #ifdef CONFIG_RV_MON_EVENTS #define CREATE_TRACE_POINTS
@@ -171,6 +172,8 @@ int rv_get_task_monitor_slot(void) { int i; + KUNIT_STATIC_STUB_REDIRECT(rv_get_task_monitor_slot); + lockdep_assert_held(&rv_interface_lock); if (task_monitor_count == CONFIG_RV_PER_TASK_MONITORS)
@@ -192,6 +195,8 @@ int rv_get_task_monitor_slot(void) void rv_put_task_monitor_slot(int slot) { + KUNIT_STATIC_STUB_REDIRECT(rv_put_task_monitor_slot, slot); + lockdep_assert_held(&rv_interface_lock); if (slot < 0 || slot >= CONFIG_RV_PER_TASK_MONITORS) {
diff --git a/kernel/trace/rv/rv_reactors.c b/kernel/trace/rv/rv_reactors.c
index 460af07f7a..3435dcedc7 100644
--- a/kernel/trace/rv/rv_reactors.c
+++ b/kernel/trace/rv/rv_reactors.c@@ -63,6 +63,7 @@ #include <linux/lockdep.h> #include <linux/slab.h> +#include <kunit/static_stub.h> #include "rv.h"
@@ -468,6 +469,12 @@ void rv_react(struct rv_monitor *monitor, const char *msg, ...) static DEFINE_WAIT_OVERRIDE_MAP(rv_react_map, LD_WAIT_FREE); va_list args; + __diag_push(); + __diag_ignore(GCC, all, "-Wsuggest-attribute=format", + "Not a valid __printf() conversion candidate."); + KUNIT_STATIC_STUB_REDIRECT(rv_react, monitor, msg); + __diag_pop(); + if (!rv_reacting_on() || !monitor->react) return;
--
2.54.0