From ded49c2eaeb1bd5e70ea4e1e35899b4937c3d4d5 Mon Sep 17 00:00:00 2001 From: Marcel Moolenaar Date: Thu, 23 Jun 2011 16:21:43 +0000 Subject: [PATCH] Unblock the outgoing thread after we performed pmap_switch() to switch the region registers. pmap_switch() returns the pmap for which the region register are currently programmed, which needs to be re-programmed on the CPU the ougoing thread gets switched in. This change does not noticibly change anything or fix known bugs, but does give me a warm fuzzy feeling by being more correct. --- sys/ia64/ia64/machdep.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c index f3105fc93f4..185e13c9893 100644 --- a/sys/ia64/ia64/machdep.c +++ b/sys/ia64/ia64/machdep.c @@ -470,12 +470,12 @@ cpu_switch(struct thread *old, struct thread *new, struct mtx *mtx) if (PCPU_GET(fpcurthread) == old) old->td_frame->tf_special.psr |= IA64_PSR_DFH; if (!savectx(oldpcb)) { - atomic_store_rel_ptr(&old->td_lock, mtx); - newpcb = new->td_pcb; oldpcb->pcb_current_pmap = pmap_switch(newpcb->pcb_current_pmap); + atomic_store_rel_ptr(&old->td_lock, mtx); + #if defined(SCHED_ULE) && defined(SMP) while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock) cpu_spinwait();