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| author | attilio <attilio@FreeBSD.org> | 2008-04-13 01:21:56 +0000 |
|---|---|---|
| committer | attilio <attilio@FreeBSD.org> | 2008-04-13 01:21:56 +0000 |
| commit | 5a49f99cf6d02cec123b5d9a859677c5ab42a0b3 (patch) | |
| tree | 2875f7429f45428189f14bb6cdbd35a4a454eec2 /sys/kern/kern_lock.c | |
| parent | ab58eeddbc23fa0c128e4048877c6a20acbd3908 (diff) | |
| download | FreeBSD-src-5a49f99cf6d02cec123b5d9a859677c5ab42a0b3.zip FreeBSD-src-5a49f99cf6d02cec123b5d9a859677c5ab42a0b3.tar.gz | |
Use a "rel" memory barrier for disowning the lock as it cames from an
exclusive locking operation.
Diffstat (limited to 'sys/kern/kern_lock.c')
| -rw-r--r-- | sys/kern/kern_lock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/kern/kern_lock.c b/sys/kern/kern_lock.c index 856642d..6653535 100644 --- a/sys/kern/kern_lock.c +++ b/sys/kern/kern_lock.c @@ -876,7 +876,7 @@ _lockmgr_disown(struct lock *lk, const char *file, int line) */ for (;;) { x = lk->lk_lock & LK_ALL_WAITERS; - if (atomic_cmpset_ptr(&lk->lk_lock, tid | x, + if (atomic_cmpset_rel_ptr(&lk->lk_lock, tid | x, LK_KERNPROC | x)) return; cpu_spinwait(); |
