amd64/73211: FAST_IPSEC broken on amd64

[Bjoern A. Zeeb]

Synopsis: FAST_IPSEC broken on amd64

Responsible-Changed-From-To: freebsd-amd64->bz
Responsible-Changed-By: bz
Responsible-Changed-When: Tue Nov 15 22:22:19 GMT 2005
Responsible-Changed-Why: 
gnn and me will work on fast_ipsec so take this PR. I have an amd64
machine here and could reproduce a panic even w/o a policy loaded.

y2k# setkey -D
[thread pid 471 tid 100057 ]
Stopped at      kdebug_sockaddr+0xb0:   decl    0xffffffffffffff8d(%rax)
db> where
Tracing pid 471 tid 100057 td 0xffffff010bfc7750
kdebug_sockaddr() at kdebug_sockaddr+0xb0
raw_usend() at raw_usend+0x74
key_send() at key_send+0xa
sosend() at sosend+0x726
kern_sendit() at kern_sendit+0x12f
sendit() at sendit+0x1d3
sendto() at sendto+0x52
syscall() at syscall+0x350
Xfast_syscall() at Xfast_syscall+0xa8
--- syscall (133, FreeBSD ELF64, sendto), rip = 0x8007e9a6c, rsp = 0x7fffffff6b98, rbp = 0x2 ---
db> show alllocks
db>

http://www.freebsd.org/cgi/query-pr.cgi?pr=73211