diff mbox series

[v2,06/14] net/mlx5: Rename kfree_rcu() to kfree_rcu_mightsleep()

Message ID 20230315181902.4177819-6-joel@joelfernandes.org
State New
Headers
Series [v2,01/14] drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep() |

Commit Message

Joel Fernandes March 15, 2023, 6:18 p.m. UTC 
  From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>

The kfree_rcu() and kvfree_rcu() macros' single-argument forms are
deprecated.  Therefore switch to the new kfree_rcu_mightsleep() and
kvfree_rcu_mightsleep() variants. The goal is to avoid accidental use
of the single-argument forms, which can introduce functionality bugs in
atomic contexts and latency bugs in non-atomic contexts.

Cc: Ariel Levkovich <lariel@nvidia.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c  | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Comments

Joel Fernandes March 26, 2023, 12:34 p.m. UTC | #1 
On Wed, Mar 15, 2023 at 2:19 PM Joel Fernandes (Google)
<joel@joelfernandes.org> wrote:
>
> From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
>
> The kfree_rcu() and kvfree_rcu() macros' single-argument forms are
> deprecated.  Therefore switch to the new kfree_rcu_mightsleep() and
> kvfree_rcu_mightsleep() variants. The goal is to avoid accidental use
> of the single-argument forms, which can introduce functionality bugs in
> atomic contexts and latency bugs in non-atomic contexts.

In a world where patches anxiously await their precious Ack, could
today be our lucky day on this one?

We need Acks to take this in for 6.4. David? Others?

 - Joel


>
> Cc: Ariel Levkovich <lariel@nvidia.com>
> Cc: Saeed Mahameed <saeedm@nvidia.com>
> Cc: Vlad Buslov <vladbu@nvidia.com>
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c  | 2 +-
>  drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
> index ca834bbcb44f..8afcec0c5d3c 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
> @@ -242,7 +242,7 @@ mlx5e_int_port_remove(struct mlx5e_tc_int_port_priv *priv,
>                 mlx5_del_flow_rules(int_port->rx_rule);
>         mapping_remove(ctx, int_port->mapping);
>         mlx5e_int_port_metadata_free(priv, int_port->match_metadata);
> -       kfree_rcu(int_port);
> +       kfree_rcu_mightsleep(int_port);
>         priv->num_ports--;
>  }
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
> index 08d0929e8260..b811dad7370a 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
> @@ -670,7 +670,7 @@ static int mlx5e_macsec_del_txsa(struct macsec_context *ctx)
>
>         mlx5e_macsec_cleanup_sa(macsec, tx_sa, true);
>         mlx5_destroy_encryption_key(macsec->mdev, tx_sa->enc_key_id);
> -       kfree_rcu(tx_sa);
> +       kfree_rcu_mightsleep(tx_sa);
>         macsec_device->tx_sa[assoc_num] = NULL;
>
>  out:
> @@ -849,7 +849,7 @@ static void macsec_del_rxsc_ctx(struct mlx5e_macsec *macsec, struct mlx5e_macsec
>         xa_erase(&macsec->sc_xarray, rx_sc->sc_xarray_element->fs_id);
>         metadata_dst_free(rx_sc->md_dst);
>         kfree(rx_sc->sc_xarray_element);
> -       kfree_rcu(rx_sc);
> +       kfree_rcu_mightsleep(rx_sc);
>  }
>
>  static int mlx5e_macsec_del_rxsc(struct macsec_context *ctx)
> --
> 2.40.0.rc1.284.g88254d51c5-goog
>
Saeed Mahameed March 27, 2023, 3:09 p.m. UTC | #2 
On 26 Mar 08:34, Joel Fernandes wrote:
>On Wed, Mar 15, 2023 at 2:19 PM Joel Fernandes (Google)
><joel@joelfernandes.org> wrote:
>>
>> From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
>>
>> The kfree_rcu() and kvfree_rcu() macros' single-argument forms are
>> deprecated.  Therefore switch to the new kfree_rcu_mightsleep() and
>> kvfree_rcu_mightsleep() variants. The goal is to avoid accidental use
>> of the single-argument forms, which can introduce functionality bugs in
>> atomic contexts and latency bugs in non-atomic contexts.
>
>In a world where patches anxiously await their precious Ack, could
>today be our lucky day on this one?
>
>We need Acks to take this in for 6.4. David? Others?
>

For mlx5 usually me, but since this is a larger series that is not mlx5
centric and targeting multiple tree, I really don't know which subsystem
you should be targeting.. for netdev submissions you need to specify the
targeted branch e.g. [PATCH v2 net-next 06/14] ... 


FWIW:

Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>


> - Joel
>
>
>>
>> Cc: Ariel Levkovich <lariel@nvidia.com>
>> Cc: Saeed Mahameed <saeedm@nvidia.com>
>> Cc: Vlad Buslov <vladbu@nvidia.com>
>> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
>> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
>> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
>> ---
>>  drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c  | 2 +-
>>  drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c | 4 ++--
>>  2 files changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
>> index ca834bbcb44f..8afcec0c5d3c 100644
>> --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
>> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
>> @@ -242,7 +242,7 @@ mlx5e_int_port_remove(struct mlx5e_tc_int_port_priv *priv,
>>                 mlx5_del_flow_rules(int_port->rx_rule);
>>         mapping_remove(ctx, int_port->mapping);
>>         mlx5e_int_port_metadata_free(priv, int_port->match_metadata);
>> -       kfree_rcu(int_port);
>> +       kfree_rcu_mightsleep(int_port);
>>         priv->num_ports--;
>>  }
>>
>> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
>> index 08d0929e8260..b811dad7370a 100644
>> --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
>> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
>> @@ -670,7 +670,7 @@ static int mlx5e_macsec_del_txsa(struct macsec_context *ctx)
>>
>>         mlx5e_macsec_cleanup_sa(macsec, tx_sa, true);
>>         mlx5_destroy_encryption_key(macsec->mdev, tx_sa->enc_key_id);
>> -       kfree_rcu(tx_sa);
>> +       kfree_rcu_mightsleep(tx_sa);
>>         macsec_device->tx_sa[assoc_num] = NULL;
>>
>>  out:
>> @@ -849,7 +849,7 @@ static void macsec_del_rxsc_ctx(struct mlx5e_macsec *macsec, struct mlx5e_macsec
>>         xa_erase(&macsec->sc_xarray, rx_sc->sc_xarray_element->fs_id);
>>         metadata_dst_free(rx_sc->md_dst);
>>         kfree(rx_sc->sc_xarray_element);
>> -       kfree_rcu(rx_sc);
>> +       kfree_rcu_mightsleep(rx_sc);
>>  }
>>
>>  static int mlx5e_macsec_del_rxsc(struct macsec_context *ctx)
>> --
>> 2.40.0.rc1.284.g88254d51c5-goog
>>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
index ca834bbcb44f..8afcec0c5d3c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/int_port.c
@@ -242,7 +242,7 @@  mlx5e_int_port_remove(struct mlx5e_tc_int_port_priv *priv,
 		mlx5_del_flow_rules(int_port->rx_rule);
 	mapping_remove(ctx, int_port->mapping);
 	mlx5e_int_port_metadata_free(priv, int_port->match_metadata);
-	kfree_rcu(int_port);
+	kfree_rcu_mightsleep(int_port);
 	priv->num_ports--;
 }
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index 08d0929e8260..b811dad7370a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -670,7 +670,7 @@  static int mlx5e_macsec_del_txsa(struct macsec_context *ctx)
 
 	mlx5e_macsec_cleanup_sa(macsec, tx_sa, true);
 	mlx5_destroy_encryption_key(macsec->mdev, tx_sa->enc_key_id);
-	kfree_rcu(tx_sa);
+	kfree_rcu_mightsleep(tx_sa);
 	macsec_device->tx_sa[assoc_num] = NULL;
 
 out:
@@ -849,7 +849,7 @@  static void macsec_del_rxsc_ctx(struct mlx5e_macsec *macsec, struct mlx5e_macsec
 	xa_erase(&macsec->sc_xarray, rx_sc->sc_xarray_element->fs_id);
 	metadata_dst_free(rx_sc->md_dst);
 	kfree(rx_sc->sc_xarray_element);
-	kfree_rcu(rx_sc);
+	kfree_rcu_mightsleep(rx_sc);
 }
 
 static int mlx5e_macsec_del_rxsc(struct macsec_context *ctx)