[Bug 2002429] [NEW] Patch needs to be removed ("debian/patches/gcc-ibmz-plt-revert.diff: Revert PLT changes from the gcc-11 branch")

[John Cabaj]

Public bug reported:

Bug #1954676 (https://bugs.launchpad.net/bugs/1954676) was opened
because of kernel soft lockup issues with Jammy 5.15. A temporary patch
to gcc-11 was identified and released under debian/patches/gcc-ibmz-plt-
revert.diff, which reverted gcc commit 0990d93 ("IBM Z: Use @PLT symbols
for local functions in 64-bit mode"). An eventual fix to the kernel
lockup was released under the upstream Linux kernel, commit
f3b7e73b2c66.

To this end, the debian/patches/gcc-ibmz-plt-revert.diff patch should be
removed from gcc-11 as it presents issues with object file symbols. An
attempt at this is in my PPA - https://launchpad.net/~john-
cabaj/+archive/ubuntu/gcc-11). This allowed me to get past my issues
with the object file symbols.

** Affects: gcc-11 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2002429

Title:
  Patch needs to be removed ("debian/patches/gcc-ibmz-plt-revert.diff:
  Revert PLT changes from the gcc-11 branch")

Status in gcc-11 package in Ubuntu:
  New

Bug description:
  Bug #1954676 (https://bugs.launchpad.net/bugs/1954676) was opened
  because of kernel soft lockup issues with Jammy 5.15. A temporary
  patch to gcc-11 was identified and released under debian/patches/gcc-
  ibmz-plt-revert.diff, which reverted gcc commit 0990d93 ("IBM Z: Use
  @PLT symbols for local functions in 64-bit mode"). An eventual fix to
  the kernel lockup was released under the upstream Linux kernel, commit
  f3b7e73b2c66.

  To this end, the debian/patches/gcc-ibmz-plt-revert.diff patch should
  be removed from gcc-11 as it presents issues with object file symbols.
  An attempt at this is in my PPA - https://launchpad.net/~john-
  cabaj/+archive/ubuntu/gcc-11). This allowed me to get past my issues
  with the object file symbols.

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