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

[bugproxy]

== 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.

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2016-09-28 17:40 EDT-------
I have backported the fix for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71709 to gcc-6-branch and gcc-5-branch. Ready to be picked up in the next fix release.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-5 - 5.4.1-2ubuntu2

---------------
gcc-5 (5.4.1-2ubuntu2) yakkety; urgency=medium

  * Update to SVN 20160929 (r240608, 5.4.1) from the gcc-5-branch.
    - Fix PR libstdc++/77686 (addresses #838438), PR libstdc++/77645,
      PR libgcc/77519, PR rtl-optimization/71709 (LP: #1628207),
      PR target/65210 (AVR), PR tree-optimization/77478, PR target/77326 (ACR),
      PR fortran/71730, PR fortran/77612, PR fortran/77694.
  * Backport from libffi trunk (Stefan Bühler):
    - Always check for PaX MPROTECT on linux, make EMUTRAMP experimental.
    - dlmmap_locked always needs locking as it always modifies execsize.

 -- Matthias Klose <email address hidden> Thu, 29 Sep 2016 02:50:07 +0200

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-6 - 6.2.0-5ubuntu11

---------------
gcc-6 (6.2.0-5ubuntu11) yakkety; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-6 (6.2.0-5) unstable; urgency=medium

  * Update to SVN 20160927 (r240553, 6.2.1) from the gcc-6-branch.
    - Fix PR sanitizer/77396, PR libstdc++/77645, PR libstdc++/77645,
      PR target/77326 (AVR), PR target/77349 (PPC), PR middle-end/77594,
      PR sanitizer/68260, PR fortran/77516, PR target/69255 (x86),
      PR c++/77553, PR c++/77539, PR fortran/77500, PR c/77450,
      PR middle-end/77436, PR tree-optimization/77514, PR middle-end/77544,
      PR tree-optimization/77514, PR middle-end/77605, PR middle-end/77679,
      PR tree-optimization/77621, PR target/77621 (x86), PR c++/71979.
  * Fix gij installation on hppa. Closes: #838111.
  * Fix PR rtl-optimization/71709, taken from the trunk. LP: #1628207.
  * Apply workaround for PR libstdc++/77686. Addresses: #838438.

gcc-6 (6.2.0-4) unstable; urgency=medium

  * Update to SVN 20160914 (r240133, 6.2.1) from the gcc-6-branch.
    - Fix PR rtl-optimization/77452, PR c++/77427.
  * gcj: Depend on the ecj1 standalone binary.
  * Configure native builds using --with-program-prefix.
  * Fix ICE in gdc symbol mangling (Iain Buclaw). LP: #1620681.
  * Backport from libffi trunk (Stefan Bühler):
    - Always check for PaX MPROTECT on linux, make EMUTRAMP experimental.
    - dlmmap_locked always needs locking as it always modifies execsize.

 -- Matthias Klose <email address hidden> Wed, 28 Sep 2016 15:58:48 +0200

[Matthias Klose (doko)]

test build for the 16.04 LTS upload:
https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/security/+packages

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-5 - 5.4.0-6ubuntu1~16.04.4

---------------
gcc-5 (5.4.0-6ubuntu1~16.04.4) xenial-security; urgency=medium

  * SRU
    - Fix PR target/72863, redundant swaps when using vec_vsx_ld/st,
      taken from the gcc-5 branch. LP: #1638055.
    - Fix PR rtl-optimization/71709, taken from the gcc-5 branch. LP: #1628207.

 -- Matthias Klose <email address hidden> Wed, 02 Nov 2016 19:23:52 +0100

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2016-11-21 00:11 EDT-------
The fix doesn't seem to have percolated to the powerpc64le cross gcc
on x86_64...

[bugproxy (bugproxy)]

Default Comment by Bridge

[Matthias Klose (doko)]

> The fix doesn't seem to have percolated to the
> powerpc64le cross gcc on x86_64...

well, you didn't ask for it (yet) ...

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2016-11-29 01:33 EDT-------
Hi,

(In reply to comment #21)
> > The fix doesn't seem to have percolated to the
> > powerpc64le cross gcc on x86_64...
>
> well, you didn't ask for it (yet) ...

Should we raise a separate request to get the fix into the powerpc64le cross compiler on x86_64 ?

[Brian Murray (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!

[Matthias Klose (doko)]

gcc-5-cross successfully built in -proposed.

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for gcc-5-cross has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-5-cross - 24ubuntu0.2

---------------
gcc-5-cross (24ubuntu0.2) xenial-proposed; urgency=medium

  * SRU: LP: #1628207, Build using the updated gcc-5 package.

 -- Matthias Klose <email address hidden> Thu, 01 Dec 2016 15:44:39 +0100