rps: add CONFIG_RPS

RPS currently depends on SMP and SYSFS

Adding a CONFIG_RPS makes sense in case this requirement changes in the
future. This patch saves about 1500 bytes of kernel text in case SMP is
on but SYSFS is off.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index c96c41e08e37..53c272f2a734 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -531,6 +531,7 @@ struct netdev_queue {
         unsigned long           tx_dropped;
 } ____cacheline_aligned_in_smp;
 
+#ifdef CONFIG_RPS
 /*
  * This structure holds an RPS map which can be of variable length.  The
  * map is an array of CPUs.
@@ -549,6 +550,7 @@ struct netdev_rx_queue {
         struct netdev_rx_queue *first;
         atomic_t count;
 } ____cacheline_aligned_in_smp;
+#endif
 
 /*
  * This structure defines the management hooks for network devices.
@@ -897,12 +899,14 @@ struct net_device {
 
         unsigned char           broadcast[MAX_ADDR_LEN];        /* hw bcast add */
 
+#ifdef CONFIG_RPS
         struct kset             *queues_kset;
 
         struct netdev_rx_queue  *_rx;
 
         /* Number of RX queues allocated at alloc_netdev_mq() time  */
         unsigned int            num_rx_queues;
+#endif
 
         struct netdev_queue     rx_queue;