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rps: add CONFIG_RPS

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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>
This commit is contained in:
Eric Dumazet 2010-03-24 19:13:54 +00:00 • committed by David S. Miller
parent 2381a55c88
commit df3345457a
3 changed files with 28 additions and 10 deletions
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4
include/linux/netdevice.h
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@ -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;