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sched_ext: Shift scx_kick_cpu() validity check to scx_bpf_kick_cpu()

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Callers that already know the cpu is valid shouldn't have to pay for a
redundant check. scx_kick_cpu() is called from the in-kernel balance loop
break-out path with the current cpu (trivially valid) and from
scx_bpf_kick_cpu() with a BPF-supplied cpu that does need validation. Move
the check out of scx_kick_cpu() into scx_bpf_kick_cpu() so the backend is
reusable by callers that have already validated.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Reviewed-by: Changwoo Min <changwoo@igalia.com>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
This commit is contained in:
Tejun Heo 2026-04-29 08:09:10 -10:00
parent 7f19c089cc
commit 017ec7d5fe
1 changed files with 1 additions and 4 deletions
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5
kernel/sched/ext.c
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@ -8812,9 +8812,6 @@ static void scx_kick_cpu(struct scx_sched *sch, s32 cpu, u64 flags)
struct rq *this_rq;
unsigned long irq_flags;
if (!scx_cpu_valid(sch, cpu, NULL))
return;
local_irq_save(irq_flags);
this_rq = this_rq();
@ -8877,7 +8874,7 @@ __bpf_kfunc void scx_bpf_kick_cpu(s32 cpu, u64 flags, const struct bpf_prog_aux
guard(rcu)();
sch = scx_prog_sched(aux);
if (likely(sch))
if (likely(sch) && scx_cpu_valid(sch, cpu, NULL))
scx_kick_cpu(sch, cpu, flags);
}