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Commit dc05360f authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: convert rps_needed and rfs_needed to new static branch api 



We prefer static_branch_unlikely() over static_key_false() these days.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Acked-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
Acked-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7c1508e5

drivers/net/tun.c

+1 −1
Original line number Diff line number Diff line
@@ -1042,7 +1042,7 @@ static int tun_net_close(struct net_device *dev) 
static void tun_automq_xmit(struct tun_struct *tun, struct sk_buff *skb)

{

#ifdef CONFIG_RPS

	if (tun->numqueues == 1 && static_key_false(&rps_needed)) {

	if (tun->numqueues == 1 && static_branch_unlikely(&rps_needed)) {

		/* Select queue was not called for the skbuff, so we extract the

		 * RPS hash and save it into the flow_table here.

		 */

include/linux/netdevice.h

+2 −2
Original line number Diff line number Diff line
@@ -194,8 +194,8 @@ struct net_device_stats { 


#ifdef CONFIG_RPS

#include <linux/static_key.h>

extern struct static_key rps_needed;

extern struct static_key rfs_needed;

extern struct static_key_false rps_needed;

extern struct static_key_false rfs_needed;

#endif



struct neighbour;

include/net/sock.h

+1 −1
Original line number Diff line number Diff line
@@ -966,7 +966,7 @@ static inline void sock_rps_record_flow_hash(__u32 hash) 
static inline void sock_rps_record_flow(const struct sock *sk)

{

#ifdef CONFIG_RPS

	if (static_key_false(&rfs_needed)) {

	if (static_branch_unlikely(&rfs_needed)) {

		/* Reading sk->sk_rxhash might incur an expensive cache line

		 * miss.

		 *

net/core/dev.c

+5 −5
Original line number Diff line number Diff line
@@ -3982,9 +3982,9 @@ EXPORT_SYMBOL(rps_sock_flow_table); 
u32 rps_cpu_mask __read_mostly;

EXPORT_SYMBOL(rps_cpu_mask);



struct static_key rps_needed __read_mostly;

struct static_key_false rps_needed __read_mostly;

EXPORT_SYMBOL(rps_needed);

struct static_key rfs_needed __read_mostly;

struct static_key_false rfs_needed __read_mostly;

EXPORT_SYMBOL(rfs_needed);



static struct rps_dev_flow *
@@ -4510,7 +4510,7 @@ static int netif_rx_internal(struct sk_buff *skb) 
	}



#ifdef CONFIG_RPS

	if (static_key_false(&rps_needed)) {

	if (static_branch_unlikely(&rps_needed)) {

		struct rps_dev_flow voidflow, *rflow = &voidflow;

		int cpu;
@@ -5179,7 +5179,7 @@ static int netif_receive_skb_internal(struct sk_buff *skb) 


	rcu_read_lock();

#ifdef CONFIG_RPS

	if (static_key_false(&rps_needed)) {

	if (static_branch_unlikely(&rps_needed)) {

		struct rps_dev_flow voidflow, *rflow = &voidflow;

		int cpu = get_rps_cpu(skb->dev, skb, &rflow);
@@ -5227,7 +5227,7 @@ static void netif_receive_skb_list_internal(struct list_head *head) 


	rcu_read_lock();

#ifdef CONFIG_RPS

	if (static_key_false(&rps_needed)) {

	if (static_branch_unlikely(&rps_needed)) {

		list_for_each_entry_safe(skb, next, head, list) {

			struct rps_dev_flow voidflow, *rflow = &voidflow;

			int cpu = get_rps_cpu(skb->dev, skb, &rflow);

net/core/net-sysfs.c

+2 −2
Original line number Diff line number Diff line
@@ -754,9 +754,9 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, 
	rcu_assign_pointer(queue->rps_map, map);



	if (map)

		static_key_slow_inc(&rps_needed);

		static_branch_inc(&rps_needed);

	if (old_map)

		static_key_slow_dec(&rps_needed);

		static_branch_dec(&rps_needed);



	mutex_unlock(&rps_map_mutex);