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| author | marcel <marcel@FreeBSD.org> | 2010-01-27 02:32:07 +0000 |
|---|---|---|
| committer | marcel <marcel@FreeBSD.org> | 2010-01-27 02:32:07 +0000 |
| commit | 0e7685cf237a34c682a1ba0440a703141430afd8 (patch) | |
| tree | 976c3617053e6076cb604afccc49f55362f287f7 /sys/ia64/ia64/machdep.c | |
| parent | 9b81a2fd8de8a8125e33b82de8bc199e4d15f54a (diff) | |
| download | FreeBSD-src-0e7685cf237a34c682a1ba0440a703141430afd8.zip FreeBSD-src-0e7685cf237a34c682a1ba0440a703141430afd8.tar.gz | |
In cpu_switch(), use an atomic operation to set the td_lock
of the old thread to the mutex that's passed.
Pointed out by: attilio, jhb
Diffstat (limited to 'sys/ia64/ia64/machdep.c')
| -rw-r--r-- | sys/ia64/ia64/machdep.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c index fd5d781..8bebde2 100644 --- a/sys/ia64/ia64/machdep.c +++ b/sys/ia64/ia64/machdep.c @@ -442,7 +442,7 @@ 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)) { - old->td_lock = mtx; + atomic_store_rel_ptr(&old->td_lock, mtx); #if defined(SCHED_ULE) && defined(SMP) /* td_lock is volatile */ while (new->td_lock == &blocked_lock) |
