Update and clarify comments regarding VFS op table initialization

in the man page and its header counterpart.

Submitted by:	Christoph Mallon <christoph.mallon@gmx.de> (initial version)
Reviewed and further improved by:	bde (previous version)
All bugs are:	mine

2 files changed, 7 insertions, 4 deletions

diff --git a/share/man/man9/VFS_SET.9 b/share/man/man9/VFS_SET.9
index 12038c8..c8e93b5 100644
--- a/share/man/man9/VFS_SET.9
+++ b/share/man/man9/VFS_SET.9
@@ -26,7 +26,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 22, 2012
+.Dd January 25, 2012
 .Dt VFS_SET 9
 .Os
 .Sh NAME
@@ -84,7 +84,9 @@ sysctl is set to
 .Sh PSEUDOCODE
 .Bd -literal
 /*
- * fill in the ones we use, and use the vfs_std for the rest.
+ * Fill in the ones we redefine.  The unused fields will be
+ * automatically initialized by pointers to vfs_std* functions
+ * during file system registration.
  */
 static struct vfsops myfs_vfsops = {
         .vfs_mount =    myfs_mount,
diff --git a/sys/sys/mount.h b/sys/sys/mount.h
index 992227c..bbbc569 100644
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -762,8 +762,9 @@ extern	struct nfs_public nfs_pub;
 
 /*
  * Declarations for these vfs default operations are located in
- * kern/vfs_default.c, they should be used instead of making "dummy"
- * functions or casting entries in the VFS op table to "enopnotsupp()".
+ * kern/vfs_default.c.  They will be automatically used to replace
+ * null entries in VFS ops tables when registering a new filesystem
+ * type in the global table.
  */
 vfs_root_t		vfs_stdroot;
 vfs_quotactl_t		vfs_stdquotactl;