[NET/IPV4/IPV6]: Change some sysctl variables to __read_mostly

Change net/core, ipv4 and ipv6 sysctl variables to __read_mostly.

Couldn't actually measure any performance increase while testing (.3%
I consider noise), but seems like the right thing to do.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 6 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 23ae5e5426db..c7e653ff5ed0 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2451,7 +2451,7 @@ static struct neigh_sysctl_table {
         ctl_table               neigh_neigh_dir[2];
         ctl_table               neigh_proto_dir[2];
         ctl_table               neigh_root_dir[2];
-} neigh_sysctl_template = {
+} neigh_sysctl_template __read_mostly = {
         .neigh_vars = {
                 {
                         .ctl_name       = NET_NEIGH_MCAST_SOLICIT,
diff --git a/net/core/sock.c b/net/core/sock.c
index b67d868649cd..cfaf09039b02 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -187,13 +187,13 @@ static struct lock_class_key af_callback_keys[AF_MAX];
 #define SK_RMEM_MAX             (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
 
 /* Run time adjustable parameters. */
-__u32 sysctl_wmem_max = SK_WMEM_MAX;
-__u32 sysctl_rmem_max = SK_RMEM_MAX;
-__u32 sysctl_wmem_default = SK_WMEM_MAX;
-__u32 sysctl_rmem_default = SK_RMEM_MAX;
+__u32 sysctl_wmem_max __read_mostly = SK_WMEM_MAX;
+__u32 sysctl_rmem_max __read_mostly = SK_RMEM_MAX;
+__u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX;
+__u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 
 /* Maximal space eaten by iovec or ancilliary data plus some space */
-int sysctl_optmem_max = sizeof(unsigned long)*(2*UIO_MAXIOV + 512);
+int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {