kern/42782: mount_mfs fails

[martin%NetBSD.org@localhost]

>Number:         42782
>Category:       kern
>Synopsis:       mount_mfs fails
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 10 09:20:01 +0000 2010
>Originator:     Martin Husemann
>Release:        NetBSD 5.99.24
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD after-hours.aprisoft.de 5.99.24 NetBSD 5.99.24 (SCHIZO) #85: Wed 
Feb 10 10:06:45 CET 2010 
martin%emmas.aprisoft.de@localhost:/nelly/usr/src/sys/arch/sparc64/compile/SCHIZO
 sparc64
Architecture: sparc64
Machine: sparc64
>Description:

Trying

 mount_mfs -s 256m swap /mnt

on a -current sparc64 system says:
mount_mfs: /mnt: mount: Unknown error: 252

This happens because VOP_MOUNT() (called in mount_domount, via do_sys_mount<-
sys___mount50) returns EPASSTHROUGH.

>How-To-Repeat:
s/a

>Fix:
n/a