diff options
| author | Marcel Moolenaar <marcel@FreeBSD.org> | 2010-01-27 02:32:07 +0000 |
|---|---|---|
| committer | Marcel Moolenaar <marcel@FreeBSD.org> | 2010-01-27 02:32:07 +0000 |
| commit | 9d908720aae724e59860e77360a79c4c995825e2 (patch) | |
| tree | 976c3617053e6076cb604afccc49f55362f287f7 /sys/ia64 | |
| parent | 5c335c81b3279e8a93ff0d645f3e858367c88ec4 (diff) | |
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
Notes
svn path=/head/; revision=203054
Diffstat (limited to 'sys/ia64')
| -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 fd5d781ca7eb..8bebde2d5cc2 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) |