CVS commit: [netbsd-7] src/sys/kern

["Soren Jacobsen" <snj%netbsd.org@localhost>]

Module Name:    src
Committed By:   snj
Date:           Tue Jan 26 23:43:34 UTC 2016

Modified Files:
        src/sys/kern [netbsd-7]: vfs_vnode.c

Log Message:
Pull up following revision(s) (requested by hannken in ticket #1070):
        sys/kern/vfs_vnode.c: revision 1.46 via patch
Take the vnode lock before the vnode is marked VI_CHANGING and fed
to vclean().  Prevents a deadlock with two null mounts on the same
physical mount where one thread tries to vclean() a layer node and
another thread tries to vget() a layer node pointing to the same
physical node.
Fixes PR kern/50375 layerfs (nullfs) locking problem leading to livelock


To generate a diff of this commit:
cvs rdiff -u -r1.37.2.1 -r1.37.2.2 src/sys/kern/vfs_vnode.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.