svn commit: r189979 - stable/7/sys/sys

[John Baldwin]

Author: jhb
Date: Wed Mar 18 18:46:50 2009
New Revision: 189979
URL: http://svn.freebsd.org/changeset/base/189979

Log:
  MFC: Add VN_LOCK_ASHARE() and VN_LOCK_AREC() macros to make it easier to
  share code with HEAD.

Modified:
  stable/7/sys/sys/vnode.h

Modified: stable/7/sys/sys/vnode.h
==============================================================================
--- stable/7/sys/sys/vnode.h	Wed Mar 18 18:43:31 2009	(r189978)
+++ stable/7/sys/sys/vnode.h	Wed Mar 18 18:46:50 2009	(r189979)
@@ -397,6 +397,9 @@ extern void	(*lease_updatetime)(int delt
 #define	VI_UNLOCK(vp)	mtx_unlock(&(vp)->v_interlock)
 #define	VI_MTX(vp)	(&(vp)->v_interlock)
 
+#define	VN_LOCK_AREC(vp)	((vp)->v_vnlock->lk_flags |= LK_CANRECURSE)
+#define	VN_LOCK_ASHARE(vp)	((vp)->v_vnlock->lk_flags &= ~LK_NOSHARE)
+
 #endif /* _KERNEL */
 
 /*