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SubjectRe: Source code compatibility in Stable series????
On Fri, May 11, 2001 at 02:56:35AM -0700, David S. Miller wrote:
>
> Rogier Wolff writes:
> > It seems that in 2.4.4 suddenly the function "skb_cow" no longer
> > returns the modified skb, but it retuns and integer for
> > succes/failure.
> >
> > This means that for networking modules requiring this function, there
> > is no source code compatibilty between 2.4.3 and 2.4.4.
>
> And skb_datarefp went away too, in fact a ton of things changes.
>
> Just deal with it.

I guess it would be possible to add a HAVE_ZEROCOPY to skbuff.h to make
it a bit easier for single source drivers.

--- include/linux/skbuff.h-o Wed May 9 12:36:44 2001
+++ include/linux/skbuff.h Fri May 11 12:12:43 2001
@@ -29,6 +29,7 @@
#define HAVE_ALLOC_SKB /* For the drivers to know */
#define HAVE_ALIGNABLE_SKB /* Ditto 8) */
#define SLAB_SKB /* Slabified skbuffs */
+#define HAVE_ZEROCOPY /* Zerocopy stack */

#define CHECKSUM_NONE 0
#define CHECKSUM_HW 1

-Andi

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