[PATCH 1/1] sched/core: uclamp: Fix compile error on !CONFIG_CGROUPS

[Patrick Bellasi]

Randy reported a compiler error on x86_64 and !CONFIG_CGROUPS which is due
to uclamp_update_active_tasks() using the undefined css_task_iter().

Since uclamp_update_active_tasks() is used only when cgroup support is
enabled, fix that by properly guarding that function at compile time.

Signed-off-by: Patrick Bellasi <patrick.bellasi@xxxxxxx>
Link: https://lore.kernel.org/lkml/1898d3c9-1997-17ce-a022-a5e28c8dc115@xxxxxxxxxxxxx/
Fixes: commit babbe170e05 ("sched/uclamp: Update CPU's refcount on TG's clamp changes")
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3c7b90bcbe4e..14873ad4b34a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1043,6 +1043,7 @@ static inline void uclamp_rq_dec(struct rq *rq, struct task_struct *p)
 		uclamp_rq_dec_id(rq, p, clamp_id);
 }
 
+#ifdef CONFIG_UCLAMP_TASK_GROUP
 static inline void
 uclamp_update_active(struct task_struct *p, enum uclamp_id clamp_id)
 {
@@ -1091,7 +1092,6 @@ uclamp_update_active_tasks(struct cgroup_subsys_state *css,
 	css_task_iter_end(&it);
 }
 
-#ifdef CONFIG_UCLAMP_TASK_GROUP
 static void cpu_util_update_eff(struct cgroup_subsys_state *css);
 static void uclamp_update_root_tg(void)
 {
-- 
2.22.0
---8<---

-- 
#include <best/regards.h>

Patrick Bellasi