linux-kernel - [PATCH 3/3] infiniband: sw: rdmavt: mcast.c: Use built-in RCU list checking

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Message-Id: <20200114162536.20388-1-madhuparnabhowmik04@gmail.com>
Date:   Tue, 14 Jan 2020 21:55:36 +0530
From:   madhuparnabhowmik04@...il.com
To:     mike.marciniszyn@...el.com, dennis.dalessandro@...el.com,
        jgg@...pe.ca, paulmck@...nel.org
Cc:     joel@...lfernandes.org, frextrite@...il.com,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        rcu@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>
Subject: [PATCH 3/3] infiniband: sw: rdmavt: mcast.c: Use built-in RCU list checking

From: Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>

Use built-in RCU and lock-checking for list_for_each_entry_rcu()
by passing the cond argument.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>
---
 drivers/infiniband/sw/rdmavt/mcast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rdmavt/mcast.c b/drivers/infiniband/sw/rdmavt/mcast.c
index dd11c6fcd060..31c7f12c7665 100644
--- a/drivers/infiniband/sw/rdmavt/mcast.c
+++ b/drivers/infiniband/sw/rdmavt/mcast.c
@@ -224,7 +224,7 @@ static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp,
 		}
 
 		/* Search the QP list to see if this is already there. */
-		list_for_each_entry_rcu(p, &tmcast->qp_list, list) {
+		list_for_each_entry_rcu(p, &tmcast->qp_list, list, lockdep_is_held(&(ibp->lock))) {
 			if (p->qp == mqp->qp) {
 				ret = ESRCH;
 				goto bail;
-- 
2.17.1