RDMA/uverbs: Get rid of ucontext->tgid

Nothing uses this now, just delete it.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/rdma_core.c

@@ -816,7 +816,6 @@ static void ufile_destroy_ucontext(struct ib_uverbs_file *ufile,
 			ib_dev->disassociate_ucontext(ucontext);
 	}
 
-	put_pid(ucontext->tgid);
 	ib_rdmacg_uncharge(&ucontext->cg_obj, ib_dev,
 			   RDMACG_RESOURCE_HCA_HANDLE);
 

drivers/infiniband/core/uverbs_cmd.c

@@ -117,9 +117,6 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 	/* ufile is required when some objects are released */
 	ucontext->ufile = file;
 
-	rcu_read_lock();
-	ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
-	rcu_read_unlock();
 	ucontext->closing = false;
 	ucontext->cleanup_retryable = false;
 
@@ -169,7 +166,6 @@ err_fd:
 	put_unused_fd(resp.async_fd);
 
 err_free:
-	put_pid(ucontext->tgid);
 	ib_dev->dealloc_ucontext(ucontext);
 
 err_alloc:

include/rdma/ib_verbs.h

@@ -1500,7 +1500,6 @@ struct ib_ucontext {
 
 	bool cleanup_retryable;
 
-	struct pid             *tgid;
 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 	void (*invalidate_range)(struct ib_umem_odp *umem_odp,
 				 unsigned long start, unsigned long end);