net: introduce __netdev_alloc_skb_ip_align

RX rings should use GFP_KERNEL allocations if possible, add
__netdev_alloc_skb_ip_align() helper to ease this.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 32ada53..a24218c 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1579,16 +1579,22 @@ static inline struct sk_buff *netdev_alloc_skb(struct net_device *dev,
        return __netdev_alloc_skb(dev, length, GFP_ATOMIC);
 }
 
-static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
-               unsigned int length)
+static inline struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
+               unsigned int length, gfp_t gfp)
 {
-       struct sk_buff *skb = netdev_alloc_skb(dev, length + NET_IP_ALIGN);
+       struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
 
        if (NET_IP_ALIGN && skb)
                skb_reserve(skb, NET_IP_ALIGN);
        return skb;
 }
 
+static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
+               unsigned int length)
+{
+       return __netdev_alloc_skb_ip_align(dev, length, GFP_ATOMIC);
+}
+
 /**
  *     __netdev_alloc_page - allocate a page for ps-rx on a specific device
  *     @dev: network device to receive on