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b=dxJgIEMRC7RwathNT4K88+W3reCXGMyzWKI4oqDGEiZhZJUCVuzzSyxgsTAbXoMFG rij3NjjZpKxWDwLW8xpxtuZ0ts3kPwdJ0HkXJzdmuw/kStSOufs82kIeF0Rje7gYgo giuO+wClAT2ip9kogWqn6+wpdpU5BZUdGsc+/jBxRDXfylztXV3Brcu5bNuvlDdg68 g/MdNbNNLmQgy+AhPfm8JfKUa0BxCmic1GcbdWPBNOKbPoP6km3p/lJwHsnocVdfbF t1TPXTCossSPPPO8ptrkY0tOh2MxTp923F+xJ7Wmknq4kMcwSuZZbm6YgPg5tzreJu L1d3c6m4v5ClQ== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 08, 2020 at 05:54:09PM +0200, Christoph Hellwig wrote: > Given that ARCH_NO_SG_CHAIN is only true for alpha, parisc and a few > arm subarchitectures I think just not supporting umem is probably > cleared. And eventually we'll need to drop ARCH_NO_SG_CHAIN entirely. It would be fine to make INFINIBAND_USER_MEM depend on !ARCH_NO_SG_CHAIN. alpha and parisc are not supported in rdma-core, and the non-multiplatform ARM sub-arches are probably also the kind that don't work with the userspace DMA model anyhow. Jason