KATO Takenori a9320ff3bd Revised fix for locking violation when unionfs calls vput with ... UN_KLOCK flag. When UN_KLOCK is set, VOP_UNLOCK should keep uppervp locked and clear UN_ULOCK flag. To do this, when UN_KLOCK is set, (1) union_unlock clears UN_ULOCK and does not clear UN_KLOCK, (2) union_lock() does not access uppervp and does not clear UN_KLOCK, and (3) callers of vput/VOP_UNLOCK should clear UN_KLOCK. For example, vput becomes: SETKLOCK(union_node); vput(vnode); CLEARKLOCK(union_node); where SETKLOCK macro sets UN_KLOCK and CLEARKLOCK macro clears UN_KLOCK.		1997-04-29 02:06:07 +00:00
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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	Avoid `lock against myself' panic by following operation:	1997-04-19 06:04:13 +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	Removed bogon from previous commit: doubly included sys/systm.h.	1997-04-27 21:32:21 +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	Revised fix for locking violation when unionfs calls vput with	1997-04-29 02:06:07 +00:00