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

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== 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.

** Affects: gcc-defaults (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-146668 severity-high targetmilestone-inin---
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boot arguments passed in CONFIG_CMDLINE not being picked up by kernel with gcc-ppc64-linux-gnu v5.4.0 and v6.1.1
https://bugs.launchpad.net/bugs/1628207
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