FreeBSD_HEAD_amd64_gcc4.9 - Build #602 - Fixed

[jenkins-admin at FreeBSD.org]

FreeBSD_HEAD_amd64_gcc4.9 - Build #602 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_amd64_gcc4.9/602/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_amd64_gcc4.9/602/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_amd64_gcc4.9/602/console

Change summaries:

288662 by rwatson:
Add missing stack unwind information to several assembly functions on
ARMv6/7:

- Define _SAVE() macro to allow unwind data to be conditionally defined for
  ARM assembly code in the kernel.

- Use _SAVE() to provide unwind information for bcopy_page(), and two (of
  many) instances of copyin() and copyout().

Reviewed by:	andrew, imp
MFC after:	3 days
Sponsored by:	University of Cambridge