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From: John Baldwin <jhb@FreeBSD.org>
Date: Wed, 21 Jan 2009 14:43:35 +0000 (UTC)
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Subject: svn commit: r187527 - head/sys/vm
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Author: jhb
Date: Wed Jan 21 14:43:35 2009
New Revision: 187527
URL: http://svn.freebsd.org/changeset/base/187527

Log:
  Now that vfs_markatime() no longer requires an exclusive lock due to
  the VOP_MARKATIME() changes, use a shared vnode lock for mmap().
  
  Submitted by:	ups

Modified:
  head/sys/vm/vm_mmap.c

Modified: head/sys/vm/vm_mmap.c
==============================================================================
--- head/sys/vm/vm_mmap.c	Wed Jan 21 14:42:00 2009	(r187526)
+++ head/sys/vm/vm_mmap.c	Wed Jan 21 14:43:35 2009	(r187527)
@@ -1160,7 +1160,7 @@ vm_mmap_vnode(struct thread *td, vm_size
 	mp = vp->v_mount;
 	cred = td->td_ucred;
 	vfslocked = VFS_LOCK_GIANT(mp);
-	if ((error = vget(vp, LK_EXCLUSIVE, td)) != 0) {
+	if ((error = vget(vp, LK_SHARED, td)) != 0) {
 		VFS_UNLOCK_GIANT(vfslocked);
 		return (error);
 	}
@@ -1177,7 +1177,7 @@ vm_mmap_vnode(struct thread *td, vm_size
 		if (obj->handle != vp) {
 			vput(vp);
 			vp = (struct vnode*)obj->handle;
-			vget(vp, LK_EXCLUSIVE, td);
+			vget(vp, LK_SHARED, td);
 		}
 		type = OBJT_VNODE;
 		handle = vp;