Messages in this thread | | | From | Dan Williams <> | Date | Fri, 14 Sep 2018 10:40:52 -0700 | Subject | Re: [PATCH v5 2/7] mm, devm_memremap_pages: Kill mapping "System RAM" support |
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On Fri, Sep 14, 2018 at 6:14 AM, Christoph Hellwig <hch@lst.de> wrote: > On Wed, Sep 12, 2018 at 07:22:11PM -0700, Dan Williams wrote: >> Given the fact that devm_memremap_pages() requires a percpu_ref that is >> torn down by devm_memremap_pages_release() the current support for >> mapping RAM is broken. > > I agree. Do you remember why we even added it in the first place?
It was initially a copy over from memremap() that catches these attempts and returns a direct-map pointer.
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