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.uytterhoe...@sonycom.com>
Cc: Jens Axboe <ax...@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;
--
1.6.2.4
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