[Midnightbsd-cvs] src: i386/i386: Opteron rev E family of processor expose a bug where, in

[laffer1 at midnightbsd.org]

Log Message:
-----------
Opteron rev E family of processor expose a bug where, in very rare
ocassions, memory barriers semantic is not honoured by the hardware
itself. As a result, some random breakage can happen in uninvestigable
ways (for further explanation see at the content of the commit itself).

As long as just a specific familly is bugged of an entire architecture
is broken, a complete fix-up is impratical without harming to some
extents the other correct cases.
Considering that (and considering the frequency of the bug exposure)
just print out a warning message if the affected machine is identified.

Pointed out by:	Samy Al Bahra <sbahra at repnop dot org>

Obtained from: FreeBSD (revision 198868)

Modified Files:
--------------
    src/sys/i386/i386:
        identcpu.c (r1.10 -> r1.11)
        (http://cvsweb.midnightbsd.org/src/sys/i386/i386/identcpu.c?r1=1.10&r2=1.11)
    src/sys/amd64/amd64:
        identcpu.c (r1.8 -> r1.9)
        (http://cvsweb.midnightbsd.org/src/sys/amd64/amd64/identcpu.c?r1=1.8&r2=1.9)