S390: Guard RISBG usage with facility check

S390: Guard RISBG usage with facility check

A use of risbg instruction is not guarded by the corresponding
GENERAL_INSTR_EXT facility check.  This will result in an illegal
instruction when running on hardware without that facility installed
(i.e. z9).

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=

Committed: https://crrev.com/c279138010961ef4040c8bfce790b8e1298cdfbc
Cr-Commit-Position: refs/heads/master@{#35206}

[JoranSiu, 2016-03-31 22:08:25]

The CQ bit was checked by joransiu@ca.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-03-31 22:08:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1848533006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1848533006/20001

[commit-bot: I haz the power, 2016-04-01 00:36:52]

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

[commit-bot: I haz the power, 2016-04-01 00:36:53]

Dry run: This issue passed the CQ dry run.

[john.yan, 2016-04-01 13:07:10]

lgtm

[JoranSiu, 2016-04-01 13:25:34]

The CQ bit was checked by joransiu@ca.ibm.com

[commit-bot: I haz the power, 2016-04-01 13:25:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1848533006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1848533006/20001

[commit-bot: I haz the power, 2016-04-01 13:27:43]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-01 13:28:03]

Description was changed from

==========
S390: Guard RISBG usage with facility check

A use of risbg instruction is not guarded by the corresponding
GENERAL_INSTR_EXT facility check.  This will result in an illegal
instruction when running on hardware without that facility installed
(i.e. z9).

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=
==========

to

==========
S390: Guard RISBG usage with facility check

A use of risbg instruction is not guarded by the corresponding
GENERAL_INSTR_EXT facility check.  This will result in an illegal
instruction when running on hardware without that facility installed
(i.e. z9).

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=

Committed: https://crrev.com/c279138010961ef4040c8bfce790b8e1298cdfbc
Cr-Commit-Position: refs/heads/master@{#35206}
==========

[commit-bot: I haz the power, 2016-04-01 13:28:04]

Patchset 2 (id:??) landed as
https://crrev.com/c279138010961ef4040c8bfce790b8e1298cdfbc
Cr-Commit-Position: refs/heads/master@{#35206}