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From: madhuparnabhowmik04@gmail.com
To: dennis.dalessandro@intel.com, mike.marciniszyn@intel.com,
	dledford@redhat.com, paulmck@kernel.org
Cc: rcu@vger.kernel.org, joel@joelfernandes.org, frextrite@gmail.com,
	linux-kernel-mentees@lists.linuxfoundation.org,
	linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
	Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
Subject: [PATCH 3/3] infiniband: sw: rdmavt: mcast.c: Use built-in RCU list checking
Date: Tue,  7 Jan 2020 23:05:10 +0530
Message-ID: <20200107173510.20320-3-madhuparnabhowmik04@gmail.com> (raw)
In-Reply-To: <20200107173510.20320-1-madhuparnabhowmik04@gmail.com>

From: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.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@gmail.com>
---
 drivers/infiniband/sw/rdmavt/mcast.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rdmavt/mcast.c b/drivers/infiniband/sw/rdmavt/mcast.c
index dd11c6fcd060..5fce375f22f4 100644
--- a/drivers/infiniband/sw/rdmavt/mcast.c
+++ b/drivers/infiniband/sw/rdmavt/mcast.c
@@ -224,7 +224,8 @@ 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
+								lock_is_held(&(ibp->lock).dep_map)) {
 			if (p->qp == mqp->qp) {
 				ret = ESRCH;
 				goto bail;
-- 
2.17.1


  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-07 17:35 [PATCH 1/3] infiniband: hw: hfi1: verbs.c: " madhuparnabhowmik04
2020-01-07 17:35 ` [PATCH 2/3] infiniband: hw: qib: qib_verbs: " madhuparnabhowmik04
2020-01-07 17:35 ` madhuparnabhowmik04 [this message]
2020-01-07 18:26 ` [PATCH 1/3] infiniband: hw: hfi1: verbs.c: " Jason Gunthorpe
2020-01-07 19:31 [PATCH 3/3] infiniband: sw: rdmavt: mcast.c: " madhuparnabhowmik04
2020-01-14 16:25 madhuparnabhowmik04
2020-02-14 17:26 ` Dennis Dalessandro

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