svn commit: r244627 - head/share/man/man9

[Andriy Gapon]

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.