Govindarajulu Varadarajan f586a33601 enic: use atomic_t instead of spin_lock in busy poll ... We use spinlock to access a single flag. We can avoid spin_locks by using atomic variable and atomic_cmpxchg(). Use atomic_cmpxchg to set the flag for idle to poll. And a simple atomic_set to unlock (set idle from poll). In napi poll, if gro is enabled, we call napi_gro_receive() to deliver the packets. Before we call napi_complete(), i.e while re-polling, if low latency busy poll is called, we use netif_receive_skb() to deliver the packets. At this point if there are some skb's held in GRO, busy poll could deliver the packets out of order. So we call napi_gro_flush() to flush skbs before we move the napi poll to idle. Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-06-25 05:23:01 -07:00
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enic	enic: use atomic_t instead of spin_lock in busy poll	2015-06-25 05:23:01 -07:00
Kconfig	drivers/net: remove all references to obsolete Ethernet-HOWTO	2015-06-23 06:50:35 -07:00
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