[Impala-CR](cdh5-trunk) Remove AMD Opteron Rev E workaround from atomicops

["Dan Hecht (Code Review)" <ge...@cloudera.org>]

Dan Hecht has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/2516

Change subject: Remove AMD Opteron Rev E workaround from atomicops
......................................................................

Remove AMD Opteron Rev E workaround from atomicops

Impala doesn't run on Opteron Rev E because those CPUs don't support
SSSE3.  So let's not pay the price of this cmp/branch on the atomics
path (which is used by our SpinLock, and I plan to make our Atomic class
use these functions in a future change).

Note that gperfutil also removed this RevE workaround since these CPUs
are getting old and apparently many kernels don't have the workaround
anyway.

Let's call the init function for atomicops, even though it's basically a
no-op for 64-bit mode (since these features are always available). But
this future proofs the code a bit better.

Change-Id: I3639dcf86c14778967c0079b8dbc222a4516cf05
---
M be/src/common/init.cc
M be/src/gutil/atomicops-internals-x86.cc
M be/src/gutil/atomicops-internals-x86.h
3 files changed, 3 insertions(+), 43 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/16/2516/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I3639dcf86c14778967c0079b8dbc222a4516cf05
Gerrit-PatchSet: 1
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Dan Hecht <dh...@cloudera.com>