K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-06-15T05:31:35.960004Z
K 7
svn:log
V 840
MFC 296180,297634

296180
    hyperv: Use proper fence function to keep store-load order for msgs

    sfence only makes sure about the store-store order, which is not
    sufficient here.  Use atomic_thread_fence_seq_cst() as suggested
    jhb and kib (a locked op in the nutshell, which should have the

    Reviewed by:        jhb, kib, Jun Su <junsu microsoft com>
    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D5436

297634
    hyperv: Use mb() instead of atomic_thread_fence_seq_cst()

    Since atomic_thread_fence_seq_cst() will become compiler fence on UP kernel.

    Reviewed by:        kib, Dexuan Cui <decui microsoft com>
    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D5852

END