[Midnightbsd-cvs] src: amd64/amd64: sync with freebsd 7.1

[laffer1 at midnightbsd.org]

Log Message:
-----------
sync with freebsd 7.1

Modified Files:
--------------
    src/sys/amd64/amd64:
        busdma_machdep.c (r1.4 -> r1.5)
        (http://cvsweb.midnightbsd.org/src/sys/amd64/amd64/busdma_machdep.c?r1=1.4&r2=1.5)
        cpu_switch.S (r1.2 -> r1.3)
        (http://cvsweb.midnightbsd.org/src/sys/amd64/amd64/cpu_switch.S?r1=1.2&r2=1.3)