On Thu, Oct 18 2007, Benny Halevy wrote: > 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; > }
Yep, thanks for catching that! -- Jens Axboe - 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/