| Message ID | 1244644748-24211-6-git-send-email-Geert.Uytterhoeven@sonycom.com |
|---|---|
| State | New |
| Headers | show |
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. Cheers, Ben. > Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> > Cc: Jens Axboe <axboe@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;
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@sonycom.com> > > Cc: Jens Axboe <axboe@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; >
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;
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. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Jens Axboe <axboe@kernel.dk> --- include/linux/bio.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)