From: Willem de Bruijn <willemdebruijn.kernel@xxxxxxxxx>
Date: Wed, 21 Jun 2017 17:18:05 -0400
> @@ -958,15 +958,20 @@ EXPORT_SYMBOL_GPL(skb_morph);
> */
> int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask)
> {
> - int i;
> int num_frags = skb_shinfo(skb)->nr_frags;
> struct page *page, *head = NULL;
> struct ubuf_info *uarg = skb_shinfo(skb)->destructor_arg;
> + int i, new_frags;
> + u32 d_off;
Reverse christmas tree with the local variable declarations.
> + page = head;
> + d_off = 0;
> + for (i = 0; i < num_frags; i++) {
> + u8 *vaddr;
> + skb_frag_t *f = &skb_shinfo(skb)->frags[i];
> + u32 f_off, f_size, copy;
Likewise.
> + f_off = f->page_offset;
> + f_size = f->size;
> +
> + vaddr = kmap_atomic(skb_frag_page(f));
I looked at some kmap_atomic() implementations and I do not think
it supports compound pages.
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