RDMA/hns: Refactor the hns_roce_buf allocation flow
Add a group of flags to control the 'struct hns_roce_buf' allocation flow, this is used to support the caller running in atomic context. Link: https://lore.kernel.org/r/1605347916-15964-1-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com> Signed-off-by: NWeihang Li <liweihang@huawei.com> Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
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