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| author | Peter Zijlstra <peterz@infradead.org> | 2023-08-01 22:41:27 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-08-14 17:01:26 +0200 |
| commit | 4bdada79f3464d85f6e187213c088e7c934e0554 (patch) | |
| tree | 6b6348269830db04ab7ed142dee19667894d125e /kernel/sched | |
| parent | sched: Simplify ttwu() (diff) | |
| download | linux-4bdada79f3464d85f6e187213c088e7c934e0554.tar.xz linux-4bdada79f3464d85f6e187213c088e7c934e0554.zip | |
sched: Simplify sched_exec()
Use guards to reduce gotos and simplify control flow.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Link: https://lore.kernel.org/r/20230801211812.168490417@infradead.org
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 68bd68d351a5..cd7f2ed1377d 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5498,23 +5498,20 @@ unsigned int nr_iowait(void) void sched_exec(void) { struct task_struct *p = current; - unsigned long flags; + struct migration_arg arg; int dest_cpu; - raw_spin_lock_irqsave(&p->pi_lock, flags); - dest_cpu = p->sched_class->select_task_rq(p, task_cpu(p), WF_EXEC); - if (dest_cpu == smp_processor_id()) - goto unlock; + scoped_guard (raw_spinlock_irqsave, &p->pi_lock) { + dest_cpu = p->sched_class->select_task_rq(p, task_cpu(p), WF_EXEC); + if (dest_cpu == smp_processor_id()) + return; - if (likely(cpu_active(dest_cpu))) { - struct migration_arg arg = { p, dest_cpu }; + if (unlikely(!cpu_active(dest_cpu))) + return; - raw_spin_unlock_irqrestore(&p->pi_lock, flags); - stop_one_cpu(task_cpu(p), migration_cpu_stop, &arg); - return; + arg = (struct migration_arg){ p, dest_cpu }; } -unlock: - raw_spin_unlock_irqrestore(&p->pi_lock, flags); + stop_one_cpu(task_cpu(p), migration_cpu_stop, &arg); } #endif |