From: Jason Gunthorpe <jgg@mellanox.com>
Date: Sun, 16 Sep 2018 20:48:12 +0300
Subject: RDMA/uverbs: Get rid of ucontext->tgid
Patch-mainline: v4.20-rc1
Git-commit: 2a3ccfdbeb6a5f832d7203e230799f1ffa46e0fc
References: bsc#1103992 FATE#326009

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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/rdma_core.c  |    1 -
 drivers/infiniband/core/uverbs_cmd.c |    4 ----
 include/rdma/ib_verbs.h              |    1 -
 3 files changed, 6 deletions(-)

--- a/drivers/infiniband/core/rdma_core.c
+++ b/drivers/infiniband/core/rdma_core.c
@@ -816,7 +816,6 @@ static void ufile_destroy_ucontext(struc
 			ib_dev->disassociate_ucontext(ucontext);
 	}
 
-	put_pid(ucontext->tgid);
 	ib_rdmacg_uncharge(&ucontext->cg_obj, ib_dev,
 			   RDMACG_RESOURCE_HCA_HANDLE);
 
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -117,9 +117,6 @@ ssize_t ib_uverbs_get_context(struct ib_
 	/* 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:
--- a/include/rdma/ib_verbs.h
+++ b/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);