From: Joel Fernandes <joel@joelfernandes.org> To: madhuparnabhowmik04@gmail.com Cc: jgg@ziepe.ca, dennis.dalessandro@intel.com, mike.marciniszyn@intel.com, dledford@redhat.com, paulmck@kernel.org, rcu@vger.kernel.org, frextrite@gmail.com, linux-kernel-mentees@lists.linuxfoundation.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/3] infiniband: hw: hfi1: verbs.c: Use built-in RCU list checking Date: Fri, 10 Jan 2020 10:54:07 -0500 [thread overview] Message-ID: <20200110155407.GB128013@google.com> (raw) In-Reply-To: <20200107203354.GD26174@ziepe.ca> On Wed, Jan 08, 2020 at 01:35:07PM +0530, madhuparnabhowmik04@gmail.com wrote: > From: Jason Gunthorpe <jgg@ziepe.ca> > > On Wed, Jan 08, 2020 at 12:59:12AM +0530, madhuparnabhowmik04@gmail.com wrote: > > From: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com> > > > > list_for_each_entry_rcu has built-in RCU and lock checking. > > Pass cond argument to list_for_each_entry_rcu. > > > > Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com> > > drivers/infiniband/hw/hfi1/verbs.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c > > index 089e201d7550..e6abdbcb4ffb 100644 > > +++ b/drivers/infiniband/hw/hfi1/verbs.c > > @@ -515,7 +515,8 @@ static inline void hfi1_handle_packet(struct hfi1_packet *packet, > > opa_get_lid(packet->dlid, 9B)); > > if (!mcast) > > goto drop; > > - list_for_each_entry_rcu(p, &mcast->qp_list, list) { > > + list_for_each_entry_rcu(p, &mcast->qp_list, list, > > + lock_is_held(&(ibp->rvp.lock).dep_map)) { > > Why .dep_map? Does this compile? Yeah, have you really compiled this? Don't send patches without at least compile testing !! > Alternatively, it can be lockdep_is_held(ibp->rvp.lock). > Please refer to the macro(link below) and let me know if the usage of lock_is_held() > in the patch is correct. > > https://elixir.bootlin.com/linux/v5.5-rc2/source/include/linux/lockdep.h#L364 Please use lockdep_is_held(). Thanks. thanks, - Joel > > Thanks, > Madhuparna > Jason
WARNING: multiple messages have this Message-ID (diff)
From: Joel Fernandes <joel@joelfernandes.org> To: madhuparnabhowmik04@gmail.com Cc: mike.marciniszyn@intel.com, paulmck@kernel.org, linux-rdma@vger.kernel.org, dennis.dalessandro@intel.com, linux-kernel@vger.kernel.org, rcu@vger.kernel.org, jgg@ziepe.ca, dledford@redhat.com, linux-kernel-mentees@lists.linuxfoundation.org Subject: Re: [Linux-kernel-mentees] [PATCH 1/3] infiniband: hw: hfi1: verbs.c: Use built-in RCU list checking Date: Fri, 10 Jan 2020 10:54:07 -0500 [thread overview] Message-ID: <20200110155407.GB128013@google.com> (raw) In-Reply-To: <20200107203354.GD26174@ziepe.ca> On Wed, Jan 08, 2020 at 01:35:07PM +0530, madhuparnabhowmik04@gmail.com wrote: > From: Jason Gunthorpe <jgg@ziepe.ca> > > On Wed, Jan 08, 2020 at 12:59:12AM +0530, madhuparnabhowmik04@gmail.com wrote: > > From: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com> > > > > list_for_each_entry_rcu has built-in RCU and lock checking. > > Pass cond argument to list_for_each_entry_rcu. > > > > Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com> > > drivers/infiniband/hw/hfi1/verbs.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c > > index 089e201d7550..e6abdbcb4ffb 100644 > > +++ b/drivers/infiniband/hw/hfi1/verbs.c > > @@ -515,7 +515,8 @@ static inline void hfi1_handle_packet(struct hfi1_packet *packet, > > opa_get_lid(packet->dlid, 9B)); > > if (!mcast) > > goto drop; > > - list_for_each_entry_rcu(p, &mcast->qp_list, list) { > > + list_for_each_entry_rcu(p, &mcast->qp_list, list, > > + lock_is_held(&(ibp->rvp.lock).dep_map)) { > > Why .dep_map? Does this compile? Yeah, have you really compiled this? Don't send patches without at least compile testing !! > Alternatively, it can be lockdep_is_held(ibp->rvp.lock). > Please refer to the macro(link below) and let me know if the usage of lock_is_held() > in the patch is correct. > > https://elixir.bootlin.com/linux/v5.5-rc2/source/include/linux/lockdep.h#L364 Please use lockdep_is_held(). Thanks. thanks, - Joel > > Thanks, > Madhuparna > Jason _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees
next prev parent reply other threads:[~2020-01-10 15:54 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-07 19:29 [PATCH 1/3] infiniband: hw: hfi1: verbs.c: Use built-in RCU list checking madhuparnabhowmik04 2020-01-07 19:29 ` [Linux-kernel-mentees] " madhuparnabhowmik04 2020-01-07 20:33 ` Jason Gunthorpe 2020-01-08 8:08 ` [Linux-kernel-mentees] " madhuparnabhowmik04 2020-01-08 8:05 ` madhuparnabhowmik04 2020-01-07 20:33 ` Jason Gunthorpe 2020-01-09 18:10 ` Jason Gunthorpe 2020-01-09 18:10 ` [Linux-kernel-mentees] " Jason Gunthorpe 2020-01-10 15:54 ` Joel Fernandes [this message] 2020-01-10 15:54 ` Joel Fernandes -- strict thread matches above, loose matches on Subject: below -- 2020-01-14 16:23 madhuparnabhowmik04 2020-01-14 16:57 ` Jason Gunthorpe 2020-01-14 17:00 ` Dennis Dalessandro 2020-01-14 18:24 ` Dennis Dalessandro 2020-01-14 19:17 ` Joel Fernandes 2020-01-14 19:41 ` Jason Gunthorpe 2020-01-14 19:46 ` Dennis Dalessandro 2020-02-14 15:43 ` [Linux-kernel-mentees] " Madhuparna Bhowmik 2020-02-14 17:24 ` Dennis Dalessandro 2020-01-07 17:35 madhuparnabhowmik04 2020-01-07 18:26 ` Jason Gunthorpe
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