On Wed, 30 Nov 2016, Prarit Bhargava wrote:
>
>
> On 11/30/2016 01:36 PM, Linus Torvalds wrote:
> > On Wed, Nov 30, 2016 at 10:28 AM, Prarit Bhargava <prarit@xxxxxxxxxx> wrote:
> > ]>
> >> In my case I tracked this to commit 3637efb00864 ("x86/mce: Add PCI quirks to
> >> identify Xeons with machine check recovery") which adds the include for
> >> generated/autoksyms.h.
> >
> > Ok, that at least makes some sense. The other blamed commit did not
> > seem to possibly make a difference.
> >
> >> Searching LKML and I came across a report from Ken Moffat from a month ago:
> >>
> >> http://marc.info/?l=linux-kernel&m=147794681124332&w=2
> >
> > Does a "make clean" get rid of it forever? Or does it come back?
>
> It comes back. The steps to reproduce this are:
>
> 1. checkout latest linux.git
> 2. make -j112
>
> (IOW, it occurs 100% of the time for me on a clean tree.)
>
> To work around the bug I have to do
>
> 1. checkout latest linux.git
> 2. comment out the include for generated/autoksyms.h at include/linux/export.h:81
> 3. compile with -j112
>
> This fails loudly, but then I do
>
> 4. uncomment the include for generated/autoksyms.h at include/linux/export.h:81
A simpler workaround is simply:
touch include/generated/autoksyms.h
But hopefully the patch I just sent would fix it for good.
Nicolas
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