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authorEric Dumazet <edumazet@google.com>2019-03-22 08:56:38 -0700
committerDavid S. Miller <davem@davemloft.net>2019-03-23 21:57:38 -0400
commitdc05360fee660a9dbe59824b3f7896534210432b (patch)
treefa8642f7e29d461bbdd900e86a5d85e131421879
parent7c1508e5f64a784988be4659dd4d6b791c008bbf (diff)
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: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/tun.c2
-rw-r--r--include/linux/netdevice.h4
-rw-r--r--include/net/sock.h2
-rw-r--r--net/core/dev.c10
-rw-r--r--net/core/net-sysfs.c4
-rw-r--r--net/core/sysctl_net_core.c8
6 files changed, 15 insertions, 15 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 27798aacb671..24d0220b9ba0 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -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.
*/
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 823762291ebf..166fdc0a78b4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -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;
diff --git a/include/net/sock.h b/include/net/sock.h
index 8de5ee258b93..fecdf639225c 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -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.
*
diff --git a/net/core/dev.c b/net/core/dev.c
index 676c9418f8e4..9ca2d3abfd1a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -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);
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 4ff661f6f989..851cabb90bce 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -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);
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 84bf2861f45f..1a2685694abd 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -95,12 +95,12 @@ static int rps_sock_flow_sysctl(struct ctl_table *table, int write,
if (sock_table != orig_sock_table) {
rcu_assign_pointer(rps_sock_flow_table, sock_table);
if (sock_table) {
- static_key_slow_inc(&rps_needed);
- static_key_slow_inc(&rfs_needed);
+ static_branch_inc(&rps_needed);
+ static_branch_inc(&rfs_needed);
}
if (orig_sock_table) {
- static_key_slow_dec(&rps_needed);
- static_key_slow_dec(&rfs_needed);
+ static_branch_dec(&rps_needed);
+ static_branch_dec(&rfs_needed);
synchronize_rcu();
vfree(orig_sock_table);
}