From e2a60da74fc8215c68509a89e9a69c66363153db Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Tue, 18 Sep 2012 12:19:25 -0400 Subject: block: Clean up special command handling logic Remove special-casing of non-rw fs style requests (discard). The nomerge flags are consolidated in blk_types.h, and rq_mergeable() and bio_mergeable() have been modified to use them. bio_is_rw() is used in place of bio_has_data() a few places. This is done to to distinguish true reads and writes from other fs type requests that carry a payload (e.g. write same). Signed-off-by: Martin K. Petersen Acked-by: Mike Snitzer Signed-off-by: Jens Axboe --- include/linux/bio.h | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) (limited to 'include/linux/bio.h') diff --git a/include/linux/bio.h b/include/linux/bio.h index 52b9cbc3e4da..e54305cacc98 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -386,9 +386,28 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx, /* * Check whether this bio carries any data or not. A NULL bio is allowed. */ -static inline int bio_has_data(struct bio *bio) +static inline bool bio_has_data(struct bio *bio) { - return bio && bio->bi_io_vec != NULL; + if (bio && bio->bi_vcnt) + return true; + + return false; +} + +static inline bool bio_is_rw(struct bio *bio) +{ + if (!bio_has_data(bio)) + return false; + + return true; +} + +static inline bool bio_mergeable(struct bio *bio) +{ + if (bio->bi_rw & REQ_NOMERGE_FLAGS) + return false; + + return true; } /* -- cgit v1.2.1