On Oct. 18, 2007, 15:32 +0200, Jens Axboe <[email protected]> wrote:
> static inline struct scatterlist *sg_next(struct scatterlist *sg)
> {
> - sg++;
> -
> - if (unlikely(sg_is_chain(sg)))
> +#ifdef CONFIG_DEBUG_SG
> + BUG_ON(sg->sg_magic != SG_MAGIC);
> +#endif
> + if (sg_is_last(sg))
> + sg = NULL;
> + else if (sg_is_chain(sg))
> sg = sg_chain_ptr(sg);
> + else
> + sg++;
>
Jens, again, please correct me if I'm wrong, but when sg points at the
entry right before a chain entry this implementation of sg_next will
return a pointer to the chain entry here, which I believe it must not.
> return sg;
> }
>
here's how I think sg_next should be implemented:
*/
static inline struct scatterlist *sg_next(struct scatterlist *sg)
{
+#ifdef CONFIG_DEBUG_SG
+ BUG_ON(sg->sg_magic != SG_MAGIC);
+#endif
+ if (sg_is_last(sg))
+ return NULL;
+
sg++;
if (unlikely(sg_is_chain(sg)))
sg = sg_chain_ptr(sg);
return sg;
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]