K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2013-11-09T20:30:13.967190Z
K 7
svn:log
V 472
Both vn_close() and VFS_PROLOGUE() evaluate vp->v_mount twice, without
holding the vnode lock; vp->v_mount is checked first for NULL
equiality, and then dereferenced if not NULL.  If vnode is reclaimed
meantime, second dereference would still give NULL.  Change
VFS_PROLOGUE() to evaluate the mp once, convert MNTK_SHARED_WRITES and
MNTK_EXTENDED_SHARED tests into inline functions.

Reviewed by:	alc
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks

END