diff options
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 962e3de25a35..c7ef6c5d3782 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1441,15 +1441,38 @@ int call_netdevice_notifiers(unsigned long val, struct net_device *dev) EXPORT_SYMBOL(call_netdevice_notifiers); static struct jump_label_key netstamp_needed __read_mostly; +#ifdef HAVE_JUMP_LABEL +/* We are not allowed to call jump_label_dec() from irq context + * If net_disable_timestamp() is called from irq context, defer the + * jump_label_dec() calls. + */ +static atomic_t netstamp_needed_deferred; +#endif void net_enable_timestamp(void) { +#ifdef HAVE_JUMP_LABEL + int deferred = atomic_xchg(&netstamp_needed_deferred, 0); + + if (deferred) { + while (--deferred) + jump_label_dec(&netstamp_needed); + return; + } +#endif + WARN_ON(in_interrupt()); jump_label_inc(&netstamp_needed); } EXPORT_SYMBOL(net_enable_timestamp); void net_disable_timestamp(void) { +#ifdef HAVE_JUMP_LABEL + if (in_interrupt()) { + atomic_inc(&netstamp_needed_deferred); + return; + } +#endif jump_label_dec(&netstamp_needed); } EXPORT_SYMBOL(net_disable_timestamp); |