PPC: Change store buffer overflow check to not rely on the store buffer being (2*Size) aligned.

PPC: Change store buffer overflow check to not rely on the store buffer being (2*Size) aligned.

Port 6a628573883d0e9f22e397379f112cd7c68856a7

Original commit message:
    This reduces the reserved virtual memory size needed for the store buffer.

R=ulan@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=chromium:578883
LOG=NO

Committed: https://crrev.com/59a0ad2dc4e719159cb6429832d627b0a587afef
Cr-Commit-Position: refs/heads/master@{#35186}

[MTBrandyberry, 2016-03-31 21:34:31]

PTAL

[MTBrandyberry, 2016-03-31 21:34:37]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-03-31 21:34:44]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1848983002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1848983002/1

[commit-bot: I haz the power, 2016-04-01 00:36:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-04-01 00:36:55]

Dry run: This issue passed the CQ dry run.

[JoranSiu, 2016-04-01 03:05:18]

On 2016/04/01 00:36:55, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[MTBrandyberry, 2016-04-01 03:30:39]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2016-04-01 03:30:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1848983002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1848983002/1

[commit-bot: I haz the power, 2016-04-01 06:09:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-01 06:10:08]

Description was changed from

==========
PPC: Change store buffer overflow check to not rely on the store buffer being
(2*Size) aligned.

Port 6a628573883d0e9f22e397379f112cd7c68856a7

Original commit message:
    This reduces the reserved virtual memory size needed for the store buffer.

R=ulan@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=chromium:578883
LOG=NO
==========

to

==========
PPC: Change store buffer overflow check to not rely on the store buffer being
(2*Size) aligned.

Port 6a628573883d0e9f22e397379f112cd7c68856a7

Original commit message:
    This reduces the reserved virtual memory size needed for the store buffer.

R=ulan@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=chromium:578883
LOG=NO

Committed: https://crrev.com/59a0ad2dc4e719159cb6429832d627b0a587afef
Cr-Commit-Position: refs/heads/master@{#35186}
==========

[commit-bot: I haz the power, 2016-04-01 06:10:08]

Patchset 1 (id:??) landed as
https://crrev.com/59a0ad2dc4e719159cb6429832d627b0a587afef
Cr-Commit-Position: refs/heads/master@{#35186}