sched_ext: Fix !CONFIG_EXT_SUB_SCHED build warnings

W=1 with CONFIG_EXT_SUB_SCHED=n flags 'err_msg' uninitialized and
'err_free_lb_resched' unused. Initialize err_msg and gate the label.

Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 48b4834c7027025b8471d7e3df9ca2cc684f0c6e..f4e2db8e56be629171d8530741866a92a340b691 100644 (file)
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -5584,7 +5584,7 @@ static void refresh_watchdog(void)
 
 static s32 scx_link_sched(struct scx_sched *sch)
 {
-       const char *err_msg;
+       const char *err_msg = "";
        s32 ret = 0;
 
        scoped_guard(raw_spinlock_irq, &scx_sched_lock) {
@@ -6652,8 +6652,10 @@ static struct scx_sched *scx_alloc_and_add_sched(struct sched_ext_ops *ops,
 #endif /* CONFIG_EXT_SUB_SCHED */
        return sch;
 
+#ifdef CONFIG_EXT_SUB_SCHED
 err_free_lb_resched:
        free_cpumask_var(sch->bypass_lb_resched_cpumask);
+#endif
 err_free_lb_cpumask:
        free_cpumask_var(sch->bypass_lb_donee_cpumask);
 err_stop_helper: