On Thu, 10 May 2007 12:21:44 +0200 Jens Axboe <[EMAIL PROTECTED]> wrote:
> First step to being able to change the scatterlist setup without > having to modify drivers (a lot :-) > > Signed-off-by: Jens Axboe <[EMAIL PROTECTED]> > --- > include/linux/scatterlist.h | 9 +++++++++ > 1 files changed, 9 insertions(+), 0 deletions(-) > > diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h > index 4efbd9c..c5bffde 100644 > --- a/include/linux/scatterlist.h > +++ b/include/linux/scatterlist.h > @@ -20,4 +20,13 @@ static inline void sg_init_one(struct scatterlist *sg, > const void *buf, > sg_set_buf(sg, buf, buflen); > } > > +#define sg_next(sg) ((sg) + 1) > +#define sg_last(sg, nents) (&(sg[nents - 1])) Looks a bit underparenthesised. > +/* > + * Loop over each sg element, following the pointer to a new list if > necessary > + */ > +#define for_each_sg(sglist, sg, nr, __i) \ > + for (__i = 0, sg = (sglist); __i < nr; __i++, sg = sg_next(sg)) > + So does this. I don't see how it "follows the pointer to a new list". All it's doing is iterating across an array? - 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/
