usbtest: comment on why this code "expects" negative and positive errnos

[karo-tx-linux.git] / net / core / skbuff.c

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4fe605fa6f8a27dd2c346bedcb78caa09fdf8e81..5c459f2b7985211e0dd8d067e925c20f2e35b958 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -200,7 +200,9 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
                goto nodata;
 
        /*
-        * See comment in sk_buff definition, just before the 'tail' member
+        * Only clear those fields we need to clear, not those that we will
+        * actually initialise below. Hence, don't put any more fields after
+        * the tail pointer in struct sk_buff!
         */
        memset(skb, 0, offsetof(struct sk_buff, tail));
        skb->truesize = size + sizeof(struct sk_buff);