K 10
svn:author
V 2
bz
K 8
svn:date
V 27
2011-03-12T09:41:25.885585Z
K 7
svn:log
V 543
Make sure the locally cached value of rt->rt_gateway stays stable,
even after dropping the reference and unlocking. Previously we
have dereferenced a NULL pointer (after r121765).
Simply unlocking after the block does not work either because of
lock ordering (see r121765) and in addition we would still hold
a pointer to something that might be gone by the time we access it.
Thus take a copy of the value rather than just caching the pointer.

PR:		kern/151908
Submitted by:	chenyl (netstar2008 126.com) (initial version)
MFC after:	2 weeks

END