linux-kernel - Re: [PATCH 4/9] drivers: Switch to kvfree

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Date:   Mon, 29 Nov 2021 12:58:37 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     "Uladzislau Rezki (Sony)" <urezki@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, RCU <rcu@...r.kernel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Daniel Axtens <dja@...ens.net>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <neeraju@...eaurora.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Theodore Y . Ts'o" <tytso@....edu>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...ymobile.com>,
        Philipp Reisner <philipp.reisner@...bit.com>,
        "Md. Haris Iqbal" <haris.iqbal@...os.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
        Samuel Iglesias Gonsalvez <siglesias@...lia.com>,
        Jorgen Hansen <jhansen@...are.com>,
        Raju Rangoju <rajur@...lsio.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Boris Pismenny <borisp@...dia.com>,
        Jiri Pirko <jiri@...dia.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 4/9] drivers: Switch to kvfree_rcu() API

On Wed, 24 Nov 2021, Uladzislau Rezki (Sony) wrote:

> Instead of invoking a synchronize_rcu() to free a pointer
> after a grace period we can directly make use of new API
> that does the same but in more efficient way.
> 
> CC: Philipp Reisner <philipp.reisner@...bit.com>
> CC: "Md. Haris Iqbal" <haris.iqbal@...os.com>
> CC: Herbert Xu <herbert@...dor.apana.org.au>
> CC: Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>
> CC: Samuel Iglesias Gonsalvez <siglesias@...lia.com>
> CC: Lee Jones <lee.jones@...aro.org>
> CC: Jorgen Hansen <jhansen@...are.com>
> CC: Raju Rangoju <rajur@...lsio.com>
> CC: Saeed Mahameed <saeedm@...dia.com>
> CC: Boris Pismenny <borisp@...dia.com>
> CC: Jiri Pirko <jiri@...dia.com>
> CC: "James E.J. Bottomley" <jejb@...ux.ibm.com>
> CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
> ---
>  drivers/block/drbd/drbd_nl.c                       | 9 +++------
>  drivers/block/drbd/drbd_receiver.c                 | 6 ++----
>  drivers/block/drbd/drbd_state.c                    | 3 +--
>  drivers/block/rnbd/rnbd-srv.c                      | 3 +--
>  drivers/crypto/nx/nx-common-pseries.c              | 3 +--
>  drivers/infiniband/hw/hfi1/sdma.c                  | 3 +--
>  drivers/ipack/carriers/tpci200.c                   | 3 +--

>  drivers/mfd/dln2.c                                 | 6 ++----

I'm not an expert in this API, but the premise and changes to MFD seem
fine at first glance:

Acked-by: Lee Jones <lee.jones@...aro.org>

>  drivers/misc/vmw_vmci/vmci_context.c               | 6 ++----
>  drivers/misc/vmw_vmci/vmci_event.c                 | 3 +--
>  drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c    | 3 +--
>  drivers/net/ethernet/mellanox/mlx5/core/en/qos.c   | 3 +--
>  drivers/net/ethernet/mellanox/mlx5/core/fpga/tls.c | 3 +--
>  drivers/net/ethernet/mellanox/mlxsw/core.c         | 3 +--
>  drivers/scsi/device_handler/scsi_dh_alua.c         | 3 +--
>  drivers/scsi/device_handler/scsi_dh_rdac.c         | 3 +--
>  drivers/staging/fwserial/fwserial.c                | 3 +--
>  17 files changed, 22 insertions(+), 44 deletions(-)

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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