Re: [PATCH 03/22] mm: remove hmm_devmem_add_resource

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On Thu, Jun 13, 2019 at 11:43:06AM +0200, Christoph Hellwig wrote:
> This function has never been used since it was first added to the kernel
> more than a year and a half ago, and if we ever grow a consumer of the
> MEMORY_DEVICE_PUBLIC infrastructure it can easily use devm_memremap_pages
> directly now that we've simplified the API for it.

nit: Have we simplified the interface for devm_memremap_pages() at
this point, or are you talking about later patches in this series.

I checked this and all the called functions are exported symbols, so
there is no blocker for a future driver to call devm_memremap_pages(),
maybe even with all this boiler plate, in future.

If we eventually get many users that need some simplified registration
then we should add a devm_memremap_pages_simplified() interface and
factor out that code when we can see the pattern.

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>

Jason





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