IB/hfi1: Rename exp_lock to exp_mutex

The mutex exp_lock in struct hfi1_ctxtdata is used to protect all
Expected TID data of a user context. This patch renames it to exp_mutex
to better reflect its identity and prepare for upcoming patches.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hfi1/hfi.h

@@ -245,8 +245,8 @@ struct hfi1_ctxtdata {
 	struct exp_tid_set tid_used_list;
 	struct exp_tid_set tid_full_list;
 
-	/* lock protecting all Expected TID data */
-	struct mutex exp_lock;
+	/* lock protecting all Expected TID data of user contexts */
+	struct mutex exp_mutex;
 	/* per-context configuration flags */
 	unsigned long flags;
 	/* per-context event flags for fileops/intr communication */

drivers/infiniband/hw/hfi1/init.c

@@ -368,7 +368,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
 		rcd->numa_id = numa;
 		rcd->rcv_array_groups = dd->rcv_entries.ngroups;
 
-		mutex_init(&rcd->exp_lock);
+		mutex_init(&rcd->exp_mutex);
 
 		hfi1_cdbg(PROC, "setting up context %u\n", rcd->ctxt);
 

drivers/infiniband/hw/hfi1/user_exp_rcv.c

@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015-2017 Intel Corporation.
+ * Copyright(c) 2015-2018 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -375,7 +375,7 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 	 * From this point on, we are going to be using shared (between master
 	 * and subcontexts) context resources. We need to take the lock.
 	 */
-	mutex_lock(&uctxt->exp_lock);
+	mutex_lock(&uctxt->exp_mutex);
 	/*
 	 * The first step is to program the RcvArray entries which are complete
 	 * groups.
@@ -461,7 +461,7 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 		}
 	}
 unlock:
-	mutex_unlock(&uctxt->exp_lock);
+	mutex_unlock(&uctxt->exp_mutex);
 nomem:
 	hfi1_cdbg(TID, "total mapped: tidpairs:%u pages:%u (%d)", tididx,
 		  mapped_pages, ret);
@@ -517,7 +517,7 @@ int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
 	if (IS_ERR(tidinfo))
 		return PTR_ERR(tidinfo);
 
-	mutex_lock(&uctxt->exp_lock);
+	mutex_lock(&uctxt->exp_mutex);
 	for (tididx = 0; tididx < tinfo->tidcnt; tididx++) {
 		ret = unprogram_rcvarray(fd, tidinfo[tididx], NULL);
 		if (ret) {
@@ -530,7 +530,7 @@ int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
 	fd->tid_used -= tididx;
 	spin_unlock(&fd->tid_lock);
 	tinfo->tidcnt = tididx;
-	mutex_unlock(&uctxt->exp_lock);
+	mutex_unlock(&uctxt->exp_mutex);
 
 	kfree(tidinfo);
 	return ret;