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sched_ext: Drop unused scx_find_sub_sched() stub

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scx_find_sub_sched()'s only caller, scx_bpf_sub_dispatch(), is gated on
CONFIG_EXT_SUB_SCHED. When CONFIG_EXT_SUB_SCHED=n the caller compiles out
and the stub becomes dead code, tripping -Wunused-function on randconfigs.
Drop the stub.

Fixes: 25037af712 ("sched_ext: Add rhashtable lookup for sub-schedulers")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/all/202605080556.42PXw8U9-lkp@intel.com/
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2026-05-07 12:09:21 -10:00
parent 4616a9c36b
commit 363a53749c
1 changed files with 0 additions and 1 deletions
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kernel/sched/ext.c
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@ -297,7 +297,6 @@ static void scx_set_task_sched(struct task_struct *p, struct scx_sched *sch)
#else /* CONFIG_EXT_SUB_SCHED */
static struct scx_sched *scx_parent(struct scx_sched *sch) { return NULL; }
static struct scx_sched *scx_next_descendant_pre(struct scx_sched *pos, struct scx_sched *root) { return pos ? NULL : root; }
static struct scx_sched *scx_find_sub_sched(u64 cgroup_id) { return NULL; }
static void scx_set_task_sched(struct task_struct *p, struct scx_sched *sch) {}
#endif /* CONFIG_EXT_SUB_SCHED */