On 01/03/18 02:10 PM, Jerome Glisse wrote:
It seems people miss-understand HMM :( you do not have to use all of its features. If all you care about is having struct page then just use that for instance in your case only use those following 3 functions: hmm_devmem_add() or hmm_devmem_add_resource() and hmm_devmem_remove() for cleanup.
To what benefit over just using devm_memremap_pages()? If I'm using the hmm interface and disabling all the features, I don't see the point. We've also cleaned up the devm_memremap_pages() interface to be more usefully generic in such a way that I'd hope HMM starts using it too and gets rid of the code duplication.
Logan
