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SubjectRe: [PATCH] mm/hmm: add ARCH_HAS_HMM_MIRROR ARCH_HAS_HMM_DEVICE Kconfig
Andrew just the patch that would be nice to get in 5.2 so i can fix
device driver Kconfig before doing the real update to mm HMM Kconfig

On Wed, Apr 17, 2019 at 05:11:41PM -0400, jglisse@redhat.com wrote:
> From: Jérôme Glisse <jglisse@redhat.com>
>
> This patch just add 2 new Kconfig that are _not use_ by anyone. I check
> that various make ARCH=somearch allmodconfig do work and do not complain.
> This new Kconfig need to be added first so that device driver that do
> depend on HMM can be updated.
>
> Once drivers are updated then i can update the HMM Kconfig to depends
> on this new Kconfig in a followup patch.
>
> Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
> Cc: Guenter Roeck <linux@roeck-us.net>
> Cc: Leon Romanovsky <leonro@mellanox.com>
> Cc: Jason Gunthorpe <jgg@mellanox.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Ralph Campbell <rcampbell@nvidia.com>
> Cc: John Hubbard <jhubbard@nvidia.com>
> ---
> mm/Kconfig | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 25c71eb8a7db..daadc9131087 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -676,6 +676,22 @@ config ZONE_DEVICE
>
> If FS_DAX is enabled, then say Y.
>
> +config ARCH_HAS_HMM_MIRROR
> + bool
> + default y
> + depends on (X86_64 || PPC64)
> + depends on MMU && 64BIT
> +
> +config ARCH_HAS_HMM_DEVICE
> + bool
> + default y
> + depends on (X86_64 || PPC64)
> + depends on MEMORY_HOTPLUG
> + depends on MEMORY_HOTREMOVE
> + depends on SPARSEMEM_VMEMMAP
> + depends on ARCH_HAS_ZONE_DEVICE
> + select XARRAY_MULTI
> +
> config ARCH_HAS_HMM
> bool
> default y
> --
> 2.20.1
>

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