Commit-ID: f0bf90def3528cebed45ebd81d9b5d0fa17d7422 Gitweb: http://git.kernel.org/tip/f0bf90def3528cebed45ebd81d9b5d0fa17d7422 Author: Sebastian Andrzej Siewior <[email protected]> AuthorDate: Thu, 3 Nov 2016 15:50:04 +0100 Committer: Thomas Gleixner <[email protected]> CommitDate: Wed, 9 Nov 2016 23:45:28 +0100
net/dev: Convert to hotplug state machine Install the callbacks via the state machine. Signed-off-by: Sebastian Andrzej Siewior <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: "David S. Miller" <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- include/linux/cpuhotplug.h | 1 + net/core/dev.c | 16 ++++++---------- 2 files changed, 7 insertions(+), 10 deletions(-) diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 31c58f6..394eb7e 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -36,6 +36,7 @@ enum cpuhp_state { CPUHP_PERCPU_CNT_DEAD, CPUHP_RADIX_DEAD, CPUHP_PAGE_ALLOC_DEAD, + CPUHP_NET_DEV_DEAD, CPUHP_WORKQUEUE_PREP, CPUHP_POWER_NUMA_PREPARE, CPUHP_HRTIMERS_PREPARE, diff --git a/net/core/dev.c b/net/core/dev.c index 820bac2..8e909b2 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7953,18 +7953,13 @@ out: } EXPORT_SYMBOL_GPL(dev_change_net_namespace); -static int dev_cpu_callback(struct notifier_block *nfb, - unsigned long action, - void *ocpu) +static int dev_cpu_dead(unsigned int oldcpu) { struct sk_buff **list_skb; struct sk_buff *skb; - unsigned int cpu, oldcpu = (unsigned long)ocpu; + unsigned int cpu; struct softnet_data *sd, *oldsd; - if (action != CPU_DEAD && action != CPU_DEAD_FROZEN) - return NOTIFY_OK; - local_irq_disable(); cpu = smp_processor_id(); sd = &per_cpu(softnet_data, cpu); @@ -8014,10 +8009,9 @@ static int dev_cpu_callback(struct notifier_block *nfb, input_queue_head_incr(oldsd); } - return NOTIFY_OK; + return 0; } - /** * netdev_increment_features - increment feature set by one * @all: current feature set @@ -8351,7 +8345,9 @@ static int __init net_dev_init(void) open_softirq(NET_TX_SOFTIRQ, net_tx_action); open_softirq(NET_RX_SOFTIRQ, net_rx_action); - hotcpu_notifier(dev_cpu_callback, 0); + rc = cpuhp_setup_state_nocalls(CPUHP_NET_DEV_DEAD, "net/dev:dead", + NULL, dev_cpu_dead); + WARN_ON(rc < 0); dst_subsys_init(); rc = 0; out:
