Re: [PATCH] mm/hmm: kconfig split HMM address space mirroring from device memory

[Guenter Roeck]

On Thu, Apr 11, 2019 at 02:03:26PM -0400, jglisse@xxxxxxxxxx wrote:
> From: Jérôme Glisse <jglisse@xxxxxxxxxx>
> 
> 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@xxxxxxxxxx>
> Cc: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> Cc: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
> Cc: John Hubbard <jhubbard@xxxxxxxxxx>
> Tested-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>

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'?

and similar errors when building alpha:allmodconfig (and maybe others).

Guenter