KATO Takenori 6db918e371 Fix `lockmgr: locking against myself' panic by multi union mount of ... same directory pair. If we do: mount -t union a b mount -t union a b then, (1) namei tries to lock fs which has been already locked by first union mount and (2) union_root() tries to lock locked fs. To avoid first deadlock condition, unlock vnode if lowerrootvp is union node, and to avoid second case, union_mount returns EDEADLK when multi union mount is detected.		1997-04-14 10:52:25 +00:00
..
deadfs	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
devfs	Get the declaration of `struct dirent' from <sys/dirent.h>, not from	1997-04-10 15:05:38 +00:00
fdesc	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
fifofs	Don't include <sys/ioctl.h> in the kernel. Stage 3: include	1997-03-24 11:37:53 +00:00
kernfs	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
nullfs	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
portal	Don't #include <sys/fcntl.h> in <sys/file.h> if KERNEL is defined.	1997-03-23 03:37:54 +00:00
procfs	Fix the gdb executable modify problem. Thanks to the detective work	1997-04-06 02:29:45 +00:00
specfs	Don't include <sys/ioctl.h> in the kernel. Stage 1: don't include	1997-03-24 11:25:10 +00:00
umapfs	Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not	1997-02-22 09:48:43 +00:00
union	Fix `lockmgr: locking against myself' panic by multi union mount of	1997-04-14 10:52:25 +00:00