Commit 13685a16 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Benjamin Herrenschmidt

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: default avatarGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent c2e95c6d
......@@ -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;
......
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