[RFC] x86: cleanup of NX enabling

[H. Peter Anvin]

Hello all,

Posting this patch series for review; I intend to commit it to
tip:x86/mm unless someone objects over the next few days.

This came about based on Kees' original patch to give better dmesg
information about the status of NX availability.

Jeremy: I'm not 100% this is safe for Xen, as Xen takes its own path
for initialization, so if you could take a quick look, it would be
most appreciated.

 arch/x86/include/asm/proto.h       |    3 +-
 arch/x86/kernel/acpi/sleep.c       |    9 ++----
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/head_32.S          |   18 +++++++----
 arch/x86/kernel/machine_kexec_32.c |    6 +--
 arch/x86/kernel/setup.c            |   17 ++++------
 arch/x86/mm/init.c                 |    4 --
 arch/x86/mm/pageattr.c             |    6 ++++
 arch/x86/mm/setup_nx.c             |   59 +++++++++++++++--------------------
 arch/x86/xen/enlighten.c           |    4 +--
 10 files changed, 58 insertions(+), 70 deletions(-)
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