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[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>
This commit is contained in:
David S. Miller 2006-12-28 21:14:52 -08:00
parent bfff6e92a3
commit e44c39bd84
1 changed files with 1 additions and 0 deletions
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1
include/linux/netdevice.h
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@ -906,6 +906,7 @@ static inline void netif_poll_disable(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);
}