[ewg] [Bug 2630] OFED-4.8-rc3 fails building QIB on 4.8.17 kernel + rhel6.6 distro

[Davis, Arlin R]

Vlad, 

Can you disable qib for kernel-4.8 builds and provide one more daily build? 
We can then promote to RC4 with this final change after a quick 4.8 build validation.

Thanks, Arlin

> -----Original Message-----
> From: ewg [mailto:ewg-bounces at lists.openfabrics.org] On Behalf Of Davis,
> Arlin R
> Sent: Tuesday, May 30, 2017 11:10 AM
> To: ewg at lists.openfabrics.org; vlad at dev.mellanox.co.il
> Subject: Re: [ewg] [Bug 2630] OFED-4.8-rc3 fails building QIB on 4.8.17 kernel
> + rhel6.6 distro
> 
> Any suggestions for this QIB build issue on 4.8? This is a blocker for RC4.
> 
> > -----Original Message-----
> > From: bugzilla at openfabrics.org [mailto:bugzilla at openfabrics.org]
> > Sent: Tuesday, May 30, 2017 6:45 AM
> > To: Davis, Arlin R <arlin.r.davis at intel.com>
> > Subject: [Bug 2630] OFED-4.8-rc3 fails building QIB on 4.8.17 kernel +
> > rhel6.6 distro
> >
> > http://bugs.openfabrics.org/show_bug.cgi?id=2630
> >
> > --- Comment #6 from lukasz.rostkowski at intel.com 2017-05-30 06:45:28
> > PDT
> > --- Sorry guys we have a bit of a differece of opinion of how to
> > approach this bug, so we would like to ask Vlad for help.
> >
> > We have found, that the problem is caused by a macro introduced in the
> > mm.h
> > (include/linux/mm.h) file:
> >
> > #ifdef HAVE_GET_USER_PAGES_6_PARAMS
> > #define get_user_pages(p1, p2, p3, p4, p5, p6, p7, p8) \
> >         get_user_pages(p3, p4, p5, p6, p7, p8) #endif
> >
> > The qib is prepared to be used in both get_user_pages() flavours,
> > becouse it has a backport for it including the ifdefs for
> > GET_USER_PARAMS_HAS_6_PARAMS.
> > Unfortunatelly the macro from the mm.h replaces proper function
> > invocation with a faulty one.
> >
> > We suggest, that it should be resovled by removing the mm.h
> > declaration and let the drivers/modules handle this on their own
> > instad of some strange generic replacement introduced by the mm.h file.
> >
> > But if we do that at this point, there are few modules that would be
> > affected (mthca, usnic, umem), which aren't yet prepared for using
> > get_user_pages in two flavors and would be needed to be updated.
> >
> > --
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