[PATCH 05/33] block: Add bio_list_peek()

[Jens Axboe]

On Mon, Jun 15 2009, Benjamin Herrenschmidt wrote:
> On Wed, 2009-06-10 at 16:38 +0200, Geert Uytterhoeven wrote:
> > Introduce bio_list_peek(), to obtain a pointer to the first bio on the bio_list
> > without actually removing it from the list. This is needed when you want to
> > serialize based on the list being empty or not.
> 
> Leaving that one (and the next one) out for now until Jens Ack them.

You can add my acked-by, this one is trivial and a good addition.

> 
> Cheers,
> Ben.
> 
> > Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven at sonycom.com>
> > Cc: Jens Axboe <axboe at kernel.dk>
> > ---
> >  include/linux/bio.h |    5 +++++
> >  1 files changed, 5 insertions(+), 0 deletions(-)
> > 
> > diff --git a/include/linux/bio.h b/include/linux/bio.h
> > index 7b214fd..618bb7d 100644
> > --- a/include/linux/bio.h
> > +++ b/include/linux/bio.h
> > @@ -590,6 +590,11 @@ static inline void bio_list_merge_head(struct bio_list *bl,
> >  	bl->head = bl2->head;
> >  }
> >  
> > +static inline struct bio *bio_list_peek(struct bio_list *bl)
> > +{
> > +	return bl->head;
> > +}
> > +
> >  static inline struct bio *bio_list_pop(struct bio_list *bl)
> >  {
> >  	struct bio *bio = bl->head;
> 

-- 
Jens Axboe