net: rename CONFIG_NET_LL_RX_POLL to CONFIG_NET_RX_BUSY_POLL

Eliezer renames several *ll_poll to *busy_poll, but forgets
CONFIG_NET_LL_RX_POLL, so in case of confusion, rename it too.

Cc: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/sysctl/net.txt b/Documentation/sysctl/net.txt
index 1c15043aaee4c89bf2c76aca10633557c1327bd3..d569f2a424d511218f679258bbb246cae2438b25 100644 (file)
--- a/Documentation/sysctl/net.txt
+++ b/Documentation/sysctl/net.txt
@@ -52,7 +52,7 @@ Default: 64
 
 busy_read
 ----------------
-Low latency busy poll timeout for socket reads. (needs CONFIG_NET_LL_RX_POLL)
+Low latency busy poll timeout for socket reads. (needs CONFIG_NET_RX_BUSY_POLL)
 Approximate time in us to busy loop waiting for packets on the device queue.
 This sets the default value of the SO_BUSY_POLL socket option.
 Can be set or overridden per socket by setting socket option SO_BUSY_POLL,
@@ -63,7 +63,7 @@ Default: 0 (off)
 
 busy_poll
 ----------------
-Low latency busy poll timeout for poll and select. (needs CONFIG_NET_LL_RX_POLL)
+Low latency busy poll timeout for poll and select. (needs CONFIG_NET_RX_BUSY_POLL)
 Approximate time in us to busy loop waiting for events.
 Recommended value depends on the number of sockets you poll on.
 For several sockets 50, for several hundreds 100.

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index dedbd76c033ede4d695e3c7498f99ff263ca860b..d80e34b8285ff4457b6660e1e2fe6fe338f2e63e 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -486,7 +486,7 @@ struct bnx2x_fastpath {
 
        struct napi_struct      napi;
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        unsigned int state;
 #define BNX2X_FP_STATE_IDLE                  0
 #define BNX2X_FP_STATE_NAPI            (1 << 0)    /* NAPI owns this FP */
@@ -498,7 +498,7 @@ struct bnx2x_fastpath {
 #define BNX2X_FP_USER_PEND (BNX2X_FP_STATE_POLL | BNX2X_FP_STATE_POLL_YIELD)
        /* protect state */
        spinlock_t lock;
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 
        union host_hc_status_block      status_blk;
        /* chip independent shortcuts into sb structure */
@@ -572,7 +572,7 @@ struct bnx2x_fastpath {
 #define bnx2x_fp_stats(bp, fp) (&((bp)->fp_stats[(fp)->index]))
 #define bnx2x_fp_qstats(bp, fp)        (&((bp)->fp_stats[(fp)->index].eth_q_stats))
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 static inline void bnx2x_fp_init_lock(struct bnx2x_fastpath *fp)
 {
        spin_lock_init(&fp->lock);
@@ -680,7 +680,7 @@ static inline bool bnx2x_fp_ll_polling(struct bnx2x_fastpath *fp)
 {
        return false;
 }
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 
 /* Use 2500 as a mini-jumbo MTU for FCoE */
 #define BNX2X_FCOE_MINI_JUMBO_MTU      2500

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
index ee350bde1818cc38c4a20a0db70a466bf158ee2e..f2d1ff10054b28ccaa9b7baddfa408821c7409af 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
@@ -3117,7 +3117,7 @@ int bnx2x_poll(struct napi_struct *napi, int budget)
        return work_done;
 }
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 /* must be called with local_bh_disable()d */
 int bnx2x_low_latency_recv(struct napi_struct *napi)
 {

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index e5da07858a2f0d5dca0747e1b7fe58992b799d5e..e06186c305d8f88d584a184175abcfd829300d4d 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12026,7 +12026,7 @@ static const struct net_device_ops bnx2x_netdev_ops = {
        .ndo_fcoe_get_wwn       = bnx2x_fcoe_get_wwn,
 #endif
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        .ndo_busy_poll          = bnx2x_low_latency_recv,
 #endif
 };

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 7be725cdfea8d3b3c7f414a500dd83b965f24d99..a6494e5daffe9d4b26171b570251b9a97d78991d 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -54,7 +54,7 @@
 
 #include <net/busy_poll.h>
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 #define LL_EXTENDED_STATS
 #endif
 /* common prefix used by pr_<> macros */
@@ -366,7 +366,7 @@ struct ixgbe_q_vector {
        struct rcu_head rcu;    /* to avoid race with update stats on free */
        char name[IFNAMSIZ + 9];
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        unsigned int state;
 #define IXGBE_QV_STATE_IDLE        0
 #define IXGBE_QV_STATE_NAPI       1    /* NAPI owns this QV */
@@ -377,12 +377,12 @@ struct ixgbe_q_vector {
 #define IXGBE_QV_YIELD (IXGBE_QV_STATE_NAPI_YIELD | IXGBE_QV_STATE_POLL_YIELD)
 #define IXGBE_QV_USER_PEND (IXGBE_QV_STATE_POLL | IXGBE_QV_STATE_POLL_YIELD)
        spinlock_t lock;
-#endif  /* CONFIG_NET_LL_RX_POLL */
+#endif  /* CONFIG_NET_RX_BUSY_POLL */
 
        /* for dynamic allocation of rings associated with this q_vector */
        struct ixgbe_ring ring[0] ____cacheline_internodealigned_in_smp;
 };
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 static inline void ixgbe_qv_init_lock(struct ixgbe_q_vector *q_vector)
 {
 
@@ -462,7 +462,7 @@ static inline bool ixgbe_qv_ll_polling(struct ixgbe_q_vector *q_vector)
        WARN_ON(!(q_vector->state & IXGBE_QV_LOCKED));
        return q_vector->state & IXGBE_QV_USER_PEND;
 }
-#else /* CONFIG_NET_LL_RX_POLL */
+#else /* CONFIG_NET_RX_BUSY_POLL */
 static inline void ixgbe_qv_init_lock(struct ixgbe_q_vector *q_vector)
 {
 }
@@ -491,7 +491,7 @@ static inline bool ixgbe_qv_ll_polling(struct ixgbe_q_vector *q_vector)
 {
        return false;
 }
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 
 #ifdef CONFIG_IXGBE_HWMON
 

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index bad8f14b194107b7d77ac5f89f194998c4c0f514..be4b1fb3d0d2c38b62bcabdb2dc80a8332634cba 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1998,7 +1998,7 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
        return total_rx_packets;
 }
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 /* must be called with local_bh_disable()d */
 static int ixgbe_low_latency_recv(struct napi_struct *napi)
 {
@@ -2030,7 +2030,7 @@ static int ixgbe_low_latency_recv(struct napi_struct *napi)
 
        return found;
 }
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 
 /**
  * ixgbe_configure_msix - Configure MSI-X hardware
@@ -7227,7 +7227,7 @@ static const struct net_device_ops ixgbe_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
        .ndo_poll_controller    = ixgbe_netpoll,
 #endif
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        .ndo_busy_poll          = ixgbe_low_latency_recv,
 #endif
 #ifdef IXGBE_FCOE

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index 727874f575cedc80e65d52d4918007151feb3c09..a28cd801a236e5a674de67009a5b872ed29e9e71 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -223,7 +223,7 @@ static int mlx4_en_get_sset_count(struct net_device *dev, int sset)
        case ETH_SS_STATS:
                return (priv->stats_bitmap ? bit_count : NUM_ALL_STATS) +
                        (priv->tx_ring_num * 2) +
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
                        (priv->rx_ring_num * 5);
 #else
                        (priv->rx_ring_num * 2);
@@ -276,7 +276,7 @@ static void mlx4_en_get_ethtool_stats(struct net_device *dev,
        for (i = 0; i < priv->rx_ring_num; i++) {
                data[index++] = priv->rx_ring[i].packets;
                data[index++] = priv->rx_ring[i].bytes;
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
                data[index++] = priv->rx_ring[i].yields;
                data[index++] = priv->rx_ring[i].misses;
                data[index++] = priv->rx_ring[i].cleaned;
@@ -344,7 +344,7 @@ static void mlx4_en_get_strings(struct net_device *dev,
                                "rx%d_packets", i);
                        sprintf(data + (index++) * ETH_GSTRING_LEN,
                                "rx%d_bytes", i);
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
                        sprintf(data + (index++) * ETH_GSTRING_LEN,
                                "rx%d_napi_yield", i);
                        sprintf(data + (index++) * ETH_GSTRING_LEN,

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 5eac871399d8ecedf4fcffff06ed4372753df77f..fa37b7a612133c739263346a5d6f372af0fd9dda 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -68,7 +68,7 @@ int mlx4_en_setup_tc(struct net_device *dev, u8 up)
        return 0;
 }
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 /* must be called with local_bh_disable()d */
 static int mlx4_en_low_latency_recv(struct napi_struct *napi)
 {
@@ -94,7 +94,7 @@ static int mlx4_en_low_latency_recv(struct napi_struct *napi)
 
        return done;
 }
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 
 #ifdef CONFIG_RFS_ACCEL
 
@@ -2140,7 +2140,7 @@ static const struct net_device_ops mlx4_netdev_ops = {
 #ifdef CONFIG_RFS_ACCEL
        .ndo_rx_flow_steer      = mlx4_en_filter_rfs,
 #endif
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        .ndo_busy_poll          = mlx4_en_low_latency_recv,
 #endif
 };

diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index 35fb60e2320c2a896e8b241c2c9dbbe575a2dd02..5e0aa569306aab2f6c8185cd1574cdd4abeb4aab 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -292,7 +292,7 @@ struct mlx4_en_rx_ring {
        void *rx_info;
        unsigned long bytes;
        unsigned long packets;
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        unsigned long yields;
        unsigned long misses;
        unsigned long cleaned;
@@ -318,7 +318,7 @@ struct mlx4_en_cq {
        struct mlx4_cqe *buf;
 #define MLX4_EN_OPCODE_ERROR   0x1e
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        unsigned int state;
 #define MLX4_EN_CQ_STATE_IDLE        0
 #define MLX4_EN_CQ_STATE_NAPI     1    /* NAPI owns this CQ */
@@ -329,7 +329,7 @@ struct mlx4_en_cq {
 #define CQ_YIELD (MLX4_EN_CQ_STATE_NAPI_YIELD | MLX4_EN_CQ_STATE_POLL_YIELD)
 #define CQ_USER_PEND (MLX4_EN_CQ_STATE_POLL | MLX4_EN_CQ_STATE_POLL_YIELD)
        spinlock_t poll_lock; /* protects from LLS/napi conflicts */
-#endif  /* CONFIG_NET_LL_RX_POLL */
+#endif  /* CONFIG_NET_RX_BUSY_POLL */
 };
 
 struct mlx4_en_port_profile {
@@ -580,7 +580,7 @@ struct mlx4_mac_entry {
        struct rcu_head rcu;
 };
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 static inline void mlx4_en_cq_init_lock(struct mlx4_en_cq *cq)
 {
        spin_lock_init(&cq->poll_lock);
@@ -687,7 +687,7 @@ static inline bool mlx4_en_cq_ll_polling(struct mlx4_en_cq *cq)
 {
        return false;
 }
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 
 #define MLX4_EN_WOL_DO_MODIFY (1ULL << 63)
 

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0741a1e919a542c53e50003560d01ed06322e658..9a4156845e9348cb4fe4b803a64041d1db5de377 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -973,7 +973,7 @@ struct net_device_ops {
                                                     gfp_t gfp);
        void                    (*ndo_netpoll_cleanup)(struct net_device *dev);
 #endif
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        int                     (*ndo_busy_poll)(struct napi_struct *dev);
 #endif
        int                     (*ndo_set_vf_mac)(struct net_device *dev,

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 5afefa01a13c892e1fe9eb7ce6fc3f047e5880ba..3b71a4e8364200d85afe94b120e09e74edf35d32 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -501,7 +501,7 @@ struct sk_buff {
        /* 7/9 bit hole (depending on ndisc_nodetype presence) */
        kmemcheck_bitfield_end(flags2);
 
-#if defined CONFIG_NET_DMA || defined CONFIG_NET_LL_RX_POLL
+#if defined CONFIG_NET_DMA || defined CONFIG_NET_RX_BUSY_POLL
        union {
                unsigned int    napi_id;
                dma_cookie_t    dma_cookie;

diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 6cd8848fec682e34919ad7f81bcb0026b6db4cb5..f18b91966d3de718528ae3d44887e937514718fc 100644 (file)
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -27,7 +27,7 @@
 #include <linux/netdevice.h>
 #include <net/ip.h>
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 
 struct napi_struct;
 extern unsigned int sysctl_net_busy_read __read_mostly;
@@ -146,7 +146,7 @@ static inline void sk_mark_napi_id(struct sock *sk, struct sk_buff *skb)
        sk->sk_napi_id = skb->napi_id;
 }
 
-#else /* CONFIG_NET_LL_RX_POLL */
+#else /* CONFIG_NET_RX_BUSY_POLL */
 static inline unsigned long net_busy_loop_on(void)
 {
        return 0;
@@ -186,5 +186,5 @@ static inline bool sk_busy_loop(struct sock *sk, int nonblock)
        return false;
 }
 
-#endif /* CONFIG_NET_LL_RX_POLL */
+#endif /* CONFIG_NET_RX_BUSY_POLL */
 #endif /* _LINUX_NET_BUSY_POLL_H */

diff --git a/include/net/sock.h b/include/net/sock.h
index 95a5a2c6925ab0745b563f7f04663721465460e7..31d5cfbb51ec9f52b57c0c339b9b5e92804701cb 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -327,7 +327,7 @@ struct sock {
 #ifdef CONFIG_RPS
        __u32                   sk_rxhash;
 #endif
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        unsigned int            sk_napi_id;
        unsigned int            sk_ll_usec;
 #endif

diff --git a/net/Kconfig b/net/Kconfig
index 37702491abe98eedd91738408851c56d3a8ea3a5..2b406608a1a4a42606e6ca3eb583f5f1b136176a 100644 (file)
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -244,7 +244,7 @@ config NETPRIO_CGROUP
          Cgroup subsystem for use in assigning processes to network priorities on
          a per-interface basis
 
-config NET_LL_RX_POLL
+config NET_RX_BUSY_POLL
        boolean
        default y
 

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 3df4d4ccf4405b640689bbedd322b225dfc2594d..2c3d0f53d198c5915669a967f273c5f5b13b12af 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -740,7 +740,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
 
        skb_copy_secmark(new, old);
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        new->napi_id    = old->napi_id;
 #endif
 }

diff --git a/net/core/sock.c b/net/core/sock.c
index 548d716c5f62ac8c9d90d0959d19022714f9585d..2c097c5a35dd8550d8a3041ae41e6afec35bf48b 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -900,7 +900,7 @@ set_rcvbuf:
                sock_valbool_flag(sk, SOCK_SELECT_ERR_QUEUE, valbool);
                break;
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        case SO_BUSY_POLL:
                /* allow unprivileged users to decrease the value */
                if ((val > sk->sk_ll_usec) && !capable(CAP_NET_ADMIN))
@@ -1170,7 +1170,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
                v.val = sock_flag(sk, SOCK_SELECT_ERR_QUEUE);
                break;
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        case SO_BUSY_POLL:
                v.val = sk->sk_ll_usec;
                break;
@@ -2292,7 +2292,7 @@ void sock_init_data(struct socket *sock, struct sock *sk)
 
        sk->sk_stamp = ktime_set(-1L, 0);
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        sk->sk_napi_id          =       0;
        sk->sk_ll_usec          =       sysctl_net_busy_read;
 #endif

diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 6609686166379765233cdbfab0e3d580a3d23051..b59b6804fd987c079720cd43c9b2f91dd21c9a8d 100644 (file)
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -298,7 +298,7 @@ static struct ctl_table net_core_table[] = {
                .proc_handler   = flow_limit_table_len_sysctl
        },
 #endif /* CONFIG_NET_FLOW_LIMIT */
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
        {
                .procname       = "busy_poll",
                .data           = &sysctl_net_busy_poll,

diff --git a/net/socket.c b/net/socket.c
index 829b460acb87e61e88928f596589b51b0947411d..b2d7c629eeb9f2de785600ed189080af9be02a3e 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -106,7 +106,7 @@
 #include <linux/atalk.h>
 #include <net/busy_poll.h>
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 unsigned int sysctl_net_busy_read __read_mostly;
 unsigned int sysctl_net_busy_poll __read_mostly;
 #endif