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Message-ID: <20190417182618.GA11499@redhat.com> Date: Wed, 17 Apr 2019 14:26:18 -0400 From: Jerome Glisse <jglisse@...hat.com> To: Guenter Roeck <linux@...ck-us.net> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, Leon Romanovsky <leonro@...lanox.com>, Jason Gunthorpe <jgg@...lanox.com>, Andrew Morton <akpm@...ux-foundation.org>, Ralph Campbell <rcampbell@...dia.com>, John Hubbard <jhubbard@...dia.com> Subject: Re: [PATCH] mm/hmm: kconfig split HMM address space mirroring from device memory On Wed, Apr 17, 2019 at 11:21:18AM -0700, Guenter Roeck wrote: > On Thu, Apr 11, 2019 at 02:03:26PM -0400, jglisse@...hat.com wrote: > > From: Jérôme Glisse <jglisse@...hat.com> > > > > To allow building device driver that only care about address space > > mirroring (like RDMA ODP) on platform that do not have all the pre- > > requisite for HMM device memory (like ZONE_DEVICE on ARM) split the > > HMM_MIRROR option dependency from the HMM_DEVICE dependency. > > > > Signed-off-by: Jérôme Glisse <jglisse@...hat.com> > > Cc: Leon Romanovsky <leonro@...lanox.com> > > Cc: Jason Gunthorpe <jgg@...lanox.com> > > Cc: Andrew Morton <akpm@...ux-foundation.org> > > Cc: Ralph Campbell <rcampbell@...dia.com> > > Cc: John Hubbard <jhubbard@...dia.com> > > Tested-by: Leon Romanovsky <leonro@...lanox.com> > > In case it hasn't been reported already: > > mm/hmm.c: In function 'hmm_vma_handle_pmd': > mm/hmm.c:537:8: error: implicit declaration of function 'pmd_pfn'; did you mean 'pte_pfn'? No it is pmd_pfn > > and similar errors when building alpha:allmodconfig (and maybe others). Does HMM_MIRROR get enabled in your config ? It should not does adding depends on (X86_64 || PPC64) to ARCH_HAS_HMM fix it ? I should just add that there for arch i do build. Cheers, Jérôme
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