RDMA/ucma: Remove mc_list and rely on xarray
It is not really necessary to keep a linked list of mcs associated with each context when we can just scan the xarray to find the right things. The removes another overloading of file->mut by relying on the xarray locking for mc instead. Link: https://lore.kernel.org/r/20200818120526.702120-6-leon@kernel.orgSigned-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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