[NET]: Add memory barrrier to netif_poll_enable()



When a driver writer calls this, they generally expect that
all previous stores and modifications they've made will be
visible before netif_poll_enable() executes, so ensure this.

Noticed by Ben H.

Signed-off-by: David S. Miller <davem@davemloft.net>

parent bfff6e92

include/linux/netdevice.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -906,6 +906,7 @@ static inline void netif_poll_disable(struct net_device *dev)

	static inline void netif_poll_enable(struct net_device *dev)		static inline void netif_poll_enable(struct net_device *dev)
	{		{
			smp_mb__before_clear_bit();
	clear_bit(__LINK_STATE_RX_SCHED, &dev->state);		clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
	}		}