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| author | jeff <jeff@FreeBSD.org> | 2005-03-31 05:18:19 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2005-03-31 05:18:19 +0000 |
| commit | 27112458d3c50f602c330698adc64c6fdd225307 (patch) | |
| tree | 647f7a8669acc1456ad7921fbf3a6246ab539613 /sys/kern | |
| parent | 0f37f556b7b917470b04f16a84165624c63eca58 (diff) | |
| download | FreeBSD-src-27112458d3c50f602c330698adc64c6fdd225307.zip FreeBSD-src-27112458d3c50f602c330698adc64c6fdd225307.tar.gz | |
- Add a LK_NOSHARE flag which forces all shared lock requests to be
treated as exclusive lock requests.
Sponsored by: Isilon Systems, Inc.
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/kern_lock.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/kern/kern_lock.c b/sys/kern/kern_lock.c index cc415af..6762c1b 100644 --- a/sys/kern/kern_lock.c +++ b/sys/kern/kern_lock.c @@ -218,7 +218,11 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line) mtx_unlock(lkp->lk_interlock); return (0); } - + if ((lkp->lk_flags & LK_NOSHARE) && + (flags & LK_TYPE_MASK) == LK_SHARED) { + flags &= ~LK_TYPE_MASK; + flags |= LK_EXCLUSIVE; + } extflags = (flags | lkp->lk_flags) & LK_EXTFLG_MASK; switch (flags & LK_TYPE_MASK) { |
