svn commit: r190680 - head/share/man/man9

[Tom Rhodes]

Author: trhodes
Date: Fri Apr  3 23:52:47 2009
New Revision: 190680
URL: http://svn.freebsd.org/changeset/base/190680

Log:
  Catch up with recent locking changes.
  
  PR:		132546
  Submitted by:	pluknet <pluknet at gmail.com>
  Reviewed by:	alc

Modified:
  head/share/man/man9/vm_map_lock.9

Modified: head/share/man/man9/vm_map_lock.9
==============================================================================
--- head/share/man/man9/vm_map_lock.9	Fri Apr  3 21:13:18 2009	(r190679)
+++ head/share/man/man9/vm_map_lock.9	Fri Apr  3 23:52:47 2009	(r190680)
@@ -73,7 +73,6 @@ The
 .Fn vm_map_lock_read
 macro obtains a read-lock on
 .Fa map .
-Currently this is implemented as an exclusive lock.
 .Pp
 The
 .Fn vm_map_unlock_read
@@ -93,23 +92,18 @@ macro attempts to obtain a read-lock on
 .Fa map .
 It returns FALSE if the lock cannot be immediately acquired;
 otherwise return TRUE with the lock acquired.
-Currently this is implemented as an exclusive lock.
 .Pp
 The
 .Fn vm_map_lock_upgrade
 macro attempts to atomically upgrade a read-lock on
 .Fa map
 to an exclusive lock.
-As read-locks are currently implemented as exclusive locks,
-this macro is a no-op.
 .Pp
 The
 .Fn vm_map_lock_downgrade
 macro attempts to downgrade an exclusive lock on
 .Fa map
 to a read-lock.
-As read-locks are currently implemented as exclusive locks,
-this macro is a no-op.
 .Sh IMPLEMENTATION NOTES
 Currently, all of the locking macros implement their locks as sleep locks.
 .Sh SEE ALSO