svn commit: r244627 - head/share/man/man9
Andriy Gapon
avg at FreeBSD.org
Sun Dec 23 12:56:05 UTC 2012
Author: avg
Date: Sun Dec 23 12:56:04 2012
New Revision: 244627
URL: http://svnweb.freebsd.org/changeset/base/244627
Log:
lock.9: fix incorrect descriptions of LK_SHARED and LK_DOWNGRADE behavior
Reviewed by: attilio
MFC after: 5 days
X-MFC after: r243900
Modified:
head/share/man/man9/lock.9
Modified: head/share/man/man9/lock.9
==============================================================================
--- head/share/man/man9/lock.9 Sun Dec 23 12:46:28 2012 (r244626)
+++ head/share/man/man9/lock.9 Sun Dec 23 12:56:04 2012 (r244627)
@@ -148,7 +148,9 @@ Flags indicating what action is to be ta
.Bl -tag -width ".Dv LK_CANRECURSE"
.It Dv LK_SHARED
Acquire a shared lock.
-If an exclusive lock is currently held, it will be downgraded.
+If an exclusive lock is currently held,
+.Dv EDEADLK
+will be returned.
.It Dv LK_EXCLUSIVE
Acquire an exclusive lock.
If an exclusive lock is already held, and
@@ -158,7 +160,8 @@ is not set, the system will
.It Dv LK_DOWNGRADE
Downgrade exclusive lock to a shared lock.
Downgrading a shared lock is not permitted.
-If an exclusive lock has been recursed, all references will be downgraded.
+If an exclusive lock has been recursed, the system will
+.Xr panic 9 .
.It Dv LK_UPGRADE
Upgrade a shared lock to an exclusive lock.
If this call fails, the shared lock is lost.
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