Messages in this thread | | | Date | Tue, 30 Apr 2019 12:56:40 +0200 | From | Christoph Hellwig <> | Subject | Re: [RFC/RFT PATCH 1/2] dma-contiguous: Simplify dma_*_from_contiguous() function calls |
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So while I really, really like this cleanup it turns out it isn't actually safe for arm :( arm remaps the CMA allocation in place instead of using a new mapping, which can be done because they don't share PMDs with the kernel.
So we'll probably need a __dma_alloc_from_contiguous version with an additional bool fallback argument - everyone but arms uses dma_alloc_from_contiguous as in your patch, just arm will get the non-fallback one.
Sorry for not sorting this our earlier.
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