diff options
| author | Jeff Roberson <jeff@FreeBSD.org> | 2005-03-31 05:18:19 +0000 |
|---|---|---|
| committer | Jeff Roberson <jeff@FreeBSD.org> | 2005-03-31 05:18:19 +0000 |
| commit | c4c0ec5ba757f3073dc5ef56f0cac931f8610160 (patch) | |
| tree | 647f7a8669acc1456ad7921fbf3a6246ab539613 /sys | |
| parent | 6e3a31bd67bcc9d7fb16ddbd0df4d6eecef9dd4b (diff) | |
Notes
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/kern/kern_lock.c | 6 | ||||
| -rw-r--r-- | sys/sys/lockmgr.h | 1 |
2 files changed, 6 insertions, 1 deletions
diff --git a/sys/kern/kern_lock.c b/sys/kern/kern_lock.c index cc415af83abd..6762c1b119ca 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) { diff --git a/sys/sys/lockmgr.h b/sys/sys/lockmgr.h index b90082455daa..248ac71f8b97 100644 --- a/sys/sys/lockmgr.h +++ b/sys/sys/lockmgr.h @@ -120,6 +120,7 @@ struct lock { #define LK_NOWAIT 0x00000010 /* do not sleep to await lock */ #define LK_SLEEPFAIL 0x00000020 /* sleep, then return failure */ #define LK_CANRECURSE 0x00000040 /* allow recursive exclusive lock */ +#define LK_NOSHARE 0x00000080 /* Only allow exclusive locks */ #define LK_TIMELOCK 0x00000100 /* use lk_timo, else no timeout */ /* * Nonpersistent external flags. |