[PATCH] static_call: fix unused variable warning

[Carlos Llamas]

'mod' is not used when !CONFIG_MODULES. Mark as __maybe_unused to
fix the following warning:

kernel/static_call.c: In function ‘__static_call_update’:
kernel/static_call.c:153:18: warning: unused variable ‘mod’ [-Wunused-variable]
  153 |   struct module *mod = site_mod->mod;
      |                  ^~~

Fixes: 9183c3f9ed71 ("static_call: Add inline static call infrastructure")
Reported-by: kernelci.org bot <b...@kernelci.org>
Signed-off-by: Carlos Llamas <cmlla...@google.com>
---
 kernel/static_call.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/static_call.c b/kernel/static_call.c
index 2c5950b0b90e..8211a34251f8 100644
--- a/kernel/static_call.c
+++ b/kernel/static_call.c
@@ -150,7 +150,7 @@ void __static_call_update(struct static_call_key *key, void 
*tramp, void *func)
 
        for (site_mod = &first; site_mod; site_mod = site_mod->next) {
                bool init = system_state < SYSTEM_RUNNING;
-               struct module *mod = site_mod->mod;
+               struct module __maybe_unused *mod = site_mod->mod;
 
                if (!site_mod->sites) {
                        /*
-- 
2.31.1.368.gbe11c130af-goog