PowerPC 8xx dcbz workaround impacts 64bit

[Anton Blanchard]

On ppc64 we notice each process calls mfpvr twice. This faults and gets emulated in the kernel.

We have counters to track this:

# cat /sys/kernel/debug/powerpc/emulated_instructions/mfpvr
2370
# cat /sys/kernel/debug/powerpc/emulated_instructions/mfpvr
2372
# cat /sys/kernel/debug/powerpc/emulated_instructions/mfpvr
2374

This was traced back to an 8xx workaround for a dcbz issue.

[Launchpad Janitor (janitor)]

This bug was fixed in the package glibc - 2.19-4ubuntu1

---------------
glibc (2.19-4ubuntu1) utopic; urgency=medium

  * Merge with Debian unstable, switching us to glibc and fixing bugs:
    - Fix invalid fd reuse while sending DNS queries (LP: #1328975)
    - Avoid Freescale 8xx dcbz workaround on ppc64el (LP: #1333499)
    - Remove wrong ibm long double assembly routines (LP: #1294588)
    - Fix incorrect frexpl results with long doubles (LP: #1333506)
  * debian/patches/powerpc/local-tune-power8.diff: When configured for
    --with-cpu=power7, adjust -mtune for power8 instead (LP: #1333524)

glibc (2.19-4) unstable; urgency=medium

  [ Aurelien Jarno ]
  * debian/debhelper.in/libc.{preinst,postrm,postinst}: correctly remove
    old ld.so configuration if more than one libc6 package is installed
    (multiarch case). Closes: #752389, #752404.

  [ Samuel Thibault ]
  * patches/hurd-i386/tg-tls-threadvar.diff: Update to fix gcc-4.9 build.

  [ Adam Conrad ]
  * debian/control.in/main: glibc-source Conflics/Replaces eglibc-source.
  * debian/patches/powerpc/local-powerpc8xx-dcbz.diff: Restrict the trap
    to 32-bit builds, since the Freescale 8xx CPUs aren't 64-bit capable.

glibc (2.19-3experimental0) experimental; urgency=medium

  [ Aurelien Jarno]
  * Switch back to glibc sources:
    - debian/control.in/*: replace eglibc by glibc, update descriptions.
    - rename debian/debhelper.in/eglibc-source.install into
      glibc-source.install.
    - rename debian/debhelper.in/eglibc-source.lintian-overrides into
      glibc-source.lintian-overrides.
    - rename debian/eglibc-source.filelist into glibc-source.filelist
    - debian/copyright: update.
    - debian/rules, debian/rules.d/*: replace eglibc by glibc.
    - source/lintian-overrides: replace eglibc by glibc.
    - debian/sysdeps/*: replace eglibc by glibc.
    - debian/po/*: update using debconf-updatepo.
    - debian/rules.d/tarball.mk: rewrite to generate the orig tarball and
      to fetch the branch updates through git.
    - patches/any/submitted-nl_langinfo-static.diff: refresh.
    - patches/any/submitted-ldsodefs_rtld_debug.diff: drop.
    - patches/any/local-dynamic-resolvconf.diff: new patch from the eglibc
      tree to dynamically take into account changes in resolv.conf.
    - patches/powerpc/local-powerpc8xx-dcbz.diff: new patch from the eglibc
      tree to workaround dcbz issues on PowerPC 8XX CPUs.
    - patches/sh4/local-fpscr_values.diff: new patch from eglibc tree to
      export the ___fpscr_values symbol on SH4.
    - patches/any/local-libpic.diff: new patch from eglibc tree to install
      *_pic.a files.
    - patches/any/local-bootstrap-headers.diff: new patch from eglibc tree
      to ease header installation when bootstrapping.

eglibc (2.19-3) unstable; urgency=medium

  [ Aurelien Jarno ]
  * debian/control.in/libc: fix libtirpc1 breaks. Closes: #751852.
  * debian/rules.d/build.mk: generate ld.so configuration file using
    DEB_HOST_MULTIARCH instead of DEB_HOST_GNU_TYPE to have a stable
    path even when the GNU triplet change.
  * debian/debhelper.in/libc.{preinst,postrm,postinst}: remove old
    ld.so configuration file on hurd-i386, i386 and k...