Re: [PATCH v2 01/14] drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
From: Joel Fernandes <hidden>
Date: 2023-03-26 12:27:26
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On Wed, Mar 15, 2023 at 2:19 PM Joel Fernandes (Google) [off-list ref] wrote:
From: "Uladzislau Rezki (Sony)" <urezki@gmail.com> The kvfree_rcu() macro's single-argument form is deprecated. Therefore switch to the new kvfree_rcu_mightsleep() variant. 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: Jens Axboe <axboe@kernel.dk> Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Jens/Others, any chance for an Ack here? - Joel
quoted hunk ↗ jump to hunk
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Joel Fernandes (Google) <redacted> --- drivers/block/drbd/drbd_nl.c | 6 +++--- drivers/block/drbd/drbd_receiver.c | 4 ++-- drivers/block/drbd/drbd_state.c | 2 +- 3 files changed, 6 insertions(+), 6 deletions(-)diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 60757ac31701..f49f2a5282e1 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c@@ -1615,7 +1615,7 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) drbd_send_sync_param(peer_device); } - kvfree_rcu(old_disk_conf); + kvfree_rcu_mightsleep(old_disk_conf); kfree(old_plan); mod_timer(&device->request_timer, jiffies + HZ); goto success;@@ -2446,7 +2446,7 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) mutex_unlock(&connection->resource->conf_update); mutex_unlock(&connection->data.mutex); - kvfree_rcu(old_net_conf); + kvfree_rcu_mightsleep(old_net_conf); if (connection->cstate >= C_WF_REPORT_PARAMS) { struct drbd_peer_device *peer_device;@@ -2860,7 +2860,7 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) new_disk_conf->disk_size = (sector_t)rs.resize_size; rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); mutex_unlock(&device->resource->conf_update); - kvfree_rcu(old_disk_conf); + kvfree_rcu_mightsleep(old_disk_conf); new_disk_conf = NULL; }diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 757f4692b5bd..e197b2a465d2 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c@@ -3759,7 +3759,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in drbd_info(connection, "peer data-integrity-alg: %s\n", integrity_alg[0] ? integrity_alg : "(none)"); - kvfree_rcu(old_net_conf); + kvfree_rcu_mightsleep(old_net_conf); return 0; disconnect_rcu_unlock:@@ -4127,7 +4127,7 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); mutex_unlock(&connection->resource->conf_update); - kvfree_rcu(old_disk_conf); + kvfree_rcu_mightsleep(old_disk_conf); drbd_info(device, "Peer sets u_size to %lu sectors (old: %lu)\n", (unsigned long)p_usize, (unsigned long)my_usize);diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index 75d13ea0024f..2aeea295fa28 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c@@ -2071,7 +2071,7 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused) conn_free_crypto(connection); mutex_unlock(&connection->resource->conf_update); - kvfree_rcu(old_conf); + kvfree_rcu_mightsleep(old_conf); } if (ns_max.susp_fen) { --2.40.0.rc1.284.g88254d51c5-goog