[PATCH] tracing: Fix -Wundef around 'struct event_mod_load'

[Nathan Chancellor]

When CONFIG_MODULES is disabled, clang warns:

  kernel/trace/trace_events.c:872:5: warning: 'CONFIG_MODULES' is not defined, evaluates to 0 [-Wundef]
    872 | #if CONFIG_MODULES
        |     ^

Use '#ifdef' to resolve the warning.

Fixes: b355247df104 ("tracing: Cache ":mod:" events for modules not loaded yet")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202501190121.E2CIJuUj-lkp@xxxxxxxxx/
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
---
 kernel/trace/trace_events.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index ab04994e4510..de934332ba36 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -869,7 +869,7 @@ static int ftrace_event_enable_disable(struct trace_event_file *file,
 	return __ftrace_event_enable_disable(file, enable, 0);
 }
 
-#if CONFIG_MODULES
+#ifdef CONFIG_MODULES
 struct event_mod_load {
 	struct list_head	list;
 	char			*module;

---
base-commit: 9f3ccaeedbe0088f1b89474bcf4187c49cfe8de2
change-id: 20250120-trace_events-fix-wundef-7a1153105f5f

Best regards,
-- 
Nathan Chancellor <nathan@xxxxxxxxxx>