Commit 13685a16 authored Jun 10, 2009 by Geert Uytterhoeven Committed by Benjamin Herrenschmidt Jun 15, 2009

block: Add bio_list_peek()

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>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent c2e95c6d

include/linux/bio.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;