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add_client_context(), ib_unregister_device() and ib_unregister_client() are designed to call from blocking context. There is no need to save and restore last interrupt state when called from such blocking context. Even though this is not a performance path, using the right spin lock API is desired for code clarity. To avoid checkpatch warning while removing flags, sizeof() is used. Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Daniel Jurgens <danielj@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>