From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
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.
TO: Jens Axboe <axboe@xxxxxxxxx>
TO: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
TO: Jason Gunthorpe <jgg@xxxxxxxxxx>
TO: drbd-dev@xxxxxxxxxxxxxxxx
TO: linux-block@xxxxxxxxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Reviewed-by: Christoph Böhmwalder <christoph.boehmwalder@xxxxxxxxxx>
---
drivers/block/drbd/drbd_nl.c | 9 +++------
drivers/block/drbd/drbd_receiver.c | 6 ++----
drivers/block/drbd/drbd_state.c | 3 +--
3 files changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 074b884ec225..ad6e40864b37 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1612,8 +1612,7 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
drbd_send_sync_param(peer_device);
}
- synchronize_rcu();
- kfree(old_disk_conf);
+ kvfree_rcu(old_disk_conf);
kfree(old_plan);
mod_timer(&device->request_timer, jiffies + HZ);
goto success;
@@ -2444,8 +2443,7 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
mutex_unlock(&connection->resource->conf_update);
mutex_unlock(&connection->data.mutex);
- synchronize_rcu();
- kfree(old_net_conf);
+ kvfree_rcu(old_net_conf);
if (connection->cstate >= C_WF_REPORT_PARAMS) {
struct drbd_peer_device *peer_device;
@@ -2859,8 +2857,7 @@ 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);
- synchronize_rcu();
- kfree(old_disk_conf);
+ kvfree_rcu(old_disk_conf);
new_disk_conf = NULL;
}
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 0825766ce910..5e10572a4d3e 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3751,8 +3751,7 @@ 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)");
- synchronize_rcu();
- kfree(old_net_conf);
+ kvfree_rcu(old_net_conf);
return 0;
disconnect_rcu_unlock:
@@ -4120,8 +4119,7 @@ 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);
- synchronize_rcu();
- kfree(old_disk_conf);
+ kvfree_rcu(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 b8a27818ab3f..826e496821c7 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -2071,8 +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);
- synchronize_rcu();
- kfree(old_conf);
+ kvfree_rcu(old_conf);
}
if (ns_max.susp_fen) {
--
2.35.1
