[Bug 1628207] Re: boot arguments passed in CONFIG_CMDLINE not being picked up by kernel with gcc-ppc64-linux-gnu v5.4.0 and v6.1.1

[Brian Murray]

Hello bugproxy, or anyone else affected,

Accepted gcc-5-cross into xenial-proposed. The package will build now
and be available at
https://launchpad.net/ubuntu/+source/gcc-5-cross/24ubuntu0.2 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: gcc-5-cross (Ubuntu Xenial)
       Status: New => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1628207

Title:
  boot arguments passed in CONFIG_CMDLINE not being picked up by kernel
  with gcc-ppc64-linux-gnu v5.4.0 and v6.1.1

Status in gcc:
  Unknown
Status in gcc-5 package in Ubuntu:
  Fix Released
Status in gcc-5-cross package in Ubuntu:
  New
Status in gcc-6 package in Ubuntu:
  Fix Released
Status in gcc-5 source package in Xenial:
  Fix Released
Status in gcc-5-cross source package in Xenial:
  Fix Committed
Status in gccgo-6 source package in Xenial:
  New

Bug description:
  == Comment: #0 - Akshay Adiga - 2016-09-22 23:55:06 ==
  ---Problem Description---
  boot arguments (passed as CONFIG_CMDLINE)  are not being
  picked up by kernel while using gcc-ppc64-linux-gnu v5.4.0 and v6.1.1.
   (gcc v5.3.1 works fine)
   
   
  ---Steps to Reproduce---
  enable following config options in .config
  CONFIG_CMDLINE_BOOL=y
  CONFIG_CMDLINE="<required boot args for the system>"
  CONFIG_CMDLINE_FORCE=y

  build kernel image and kexec without additional boot args.

  The system does not boot as it does not get the boot args.

  I have debugged to issue to gcc compiler optimization :
  https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-September/149026.html

  The problem has been reported and fixed in upstream gcc
     https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71709

  Need to backport this fix for gcc-ppc64-linux-gnu v5.4.0 onwards.

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