Hi Randy, Thanks for the report. On Wed, Sep 12, 2018 at 05:45:08PM -0700, Randy Dunlap wrote: > Multiple build errors when CONFIG_SMP is not set: (this is on i386 fwiw) > > in the psi (pressure) patches, I guess: > > In file included from ../kernel/sched/sched.h:1367:0, > from ../kernel/sched/core.c:8: > ../kernel/sched/stats.h: In function 'psi_task_tick': > ../kernel/sched/stats.h:135:33: error: 'struct rq' has no member named 'cpu' > psi_memstall_tick(rq->curr, rq->cpu); This needs to use the SMP/UP config-aware accessor. Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> --- diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h index 2e07d8f59b3e..4904c4677000 100644 --- a/kernel/sched/stats.h +++ b/kernel/sched/stats.h @@ -132,7 +132,7 @@ static inline void psi_task_tick(struct rq *rq) return; if (unlikely(rq->curr->flags & PF_MEMSTALL)) - psi_memstall_tick(rq->curr, rq->cpu); + psi_memstall_tick(rq->curr, cpu_of(rq)); } #else /* CONFIG_PSI */ static inline void psi_enqueue(struct task_struct *p, bool wakeup) {}