net: introduce netif_addr_lock_nested() and call if when appropriate

[cascardo/linux.git] / net / core / sysctl_net_core.c

diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 77a65f0..d05559d 100644 (file)
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -68,8 +68,13 @@ static int rps_sock_flow_sysctl(ctl_table *table, int write,
 
                if (sock_table != orig_sock_table) {
                        rcu_assign_pointer(rps_sock_flow_table, sock_table);
-                       synchronize_rcu();
-                       vfree(orig_sock_table);
+                       if (sock_table)
+                               jump_label_inc(&rps_needed);
+                       if (orig_sock_table) {
+                               jump_label_dec(&rps_needed);
+                               synchronize_rcu();
+                               vfree(orig_sock_table);
+                       }
                }
        }