linux-kernel - Re: [PATCH 0/5] Further sanitize INTEL

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Date:   Thu, 22 Aug 2019 13:53:12 -0700
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] Further sanitize INTEL_FAM6 naming

On Thu, Aug 22, 2019 at 12:23:06PM +0200, Peter Zijlstra wrote:
> Lots of variation has crept in; time to collapse the lot again.

Conceptually good.  But I applied the series on top of tip/master
and got a build error:

  CC      arch/x86/kernel/cpu/common.o
arch/x86/kernel/cpu/common.c:1031:19: error: ‘INTEL_FAM6_ATOM_SILVERMONT_X’ undeclared here (not in a function); did you mean ‘INTEL_FAM6_ATOM_SILVERMONT_D’?
  VULNWL(INTEL, 6, INTEL_FAM6_##model, whitelist)
                   ^~~~~~~~~~~
arch/x86/kernel/cpu/common.c:1028:35: note: in definition of macro ‘VULNWL’
  { X86_VENDOR_##_vendor, _family, _model, X86_FEATURE_ANY, _whitelist }
                                   ^~~~~~
arch/x86/kernel/cpu/common.c:1053:2: note: in expansion of macro ‘VULNWL_INTEL’
  VULNWL_INTEL(ATOM_SILVERMONT_X,  NO_SSB | NO_L1TF | MSBDS_ONLY | NO_SWAPGS),
  ^~~~~~~~~~~~
arch/x86/kernel/cpu/common.c:1031:19: error: ‘INTEL_FAM6_ATOM_GOLDMONT_X’ undeclared here (not in a function); did you mean ‘INTEL_FAM6_ATOM_GOLDMONT_D’?
  VULNWL(INTEL, 6, INTEL_FAM6_##model, whitelist)
                   ^~~~~~~~~~~
arch/x86/kernel/cpu/common.c:1028:35: note: in definition of macro ‘VULNWL’
  { X86_VENDOR_##_vendor, _family, _model, X86_FEATURE_ANY, _whitelist }
                                   ^~~~~~
arch/x86/kernel/cpu/common.c:1064:2: note: in expansion of macro ‘VULNWL_INTEL’
  VULNWL_INTEL(ATOM_GOLDMONT_X,  NO_MDS | NO_L1TF | NO_SWAPGS),
  ^~~~~~~~~~~~
make[3]: *** [scripts/Makefile.build:281: arch/x86/kernel/cpu/common.o] Error 1


Looks like your scripts didn't anticipate the CPP gymnastics like:

#define VULNWL_INTEL(model, whitelist)          \
        VULNWL(INTEL, 6, INTEL_FAM6_##model, whitelist)

-Tony