tcp: avoid order-1 allocations on wifi and tx path

[pandora-kernel.git] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 192250b..70a3f8d 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -481,6 +481,7 @@ struct sk_buff {
        union {
                __u32           mark;
                __u32           dropcount;
+               __u32           avail_size;
        };
 
        sk_buff_data_t          transport_header;
@@ -501,7 +502,6 @@ struct sk_buff {
  */
 #include <linux/slab.h>
 
-#include <asm/system.h>
 
 /*
  * skb might have a dst pointer attached, refcounted or not.
@@ -1366,6 +1366,18 @@ static inline int skb_tailroom(const struct sk_buff *skb)
        return skb_is_nonlinear(skb) ? 0 : skb->end - skb->tail;
 }
 
+/**
+ *     skb_availroom - bytes at buffer end
+ *     @skb: buffer to check
+ *
+ *     Return the number of bytes of free space at the tail of an sk_buff
+ *     allocated by sk_stream_alloc()
+ */
+static inline int skb_availroom(const struct sk_buff *skb)
+{
+       return skb_is_nonlinear(skb) ? 0 : skb->avail_size - skb->len;
+}
+
 /**
  *     skb_reserve - adjust headroom
  *     @skb: buffer to alter