| Message ID | 20220704124500.155247-5-hch@lst.de (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | Mike Snitzer |
| Headers | show |
| Series | [01/17] block: remove a superflous ifdef in blkdev.h | expand |
On 7/4/22 21:44, Christoph Hellwig wrote: > Drop the unused q argument, and invert the check to move the exception > into a branch and the regular path as the normal return. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- > block/blk-core.c | 2 +- > block/blk-merge.c | 2 +- > block/blk-mq.c | 2 +- > block/blk-mq.h | 18 ++++++++---------- > 4 files changed, 11 insertions(+), 13 deletions(-) > > diff --git a/block/blk-core.c b/block/blk-core.c > index 6bcca0b686de4..bc16e9bae2dc4 100644 > --- a/block/blk-core.c > +++ b/block/blk-core.c > @@ -719,7 +719,7 @@ void submit_bio_noacct(struct bio *bio) > > might_sleep(); > > - plug = blk_mq_plug(q, bio); > + plug = blk_mq_plug(bio); > if (plug && plug->nowait) > bio->bi_opf |= REQ_NOWAIT; > > diff --git a/block/blk-merge.c b/block/blk-merge.c > index 0f5f42ebd0bb0..5abf5aa5a5f0e 100644 > --- a/block/blk-merge.c > +++ b/block/blk-merge.c > @@ -1051,7 +1051,7 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, > struct blk_plug *plug; > struct request *rq; > > - plug = blk_mq_plug(q, bio); > + plug = blk_mq_plug(bio); > if (!plug || rq_list_empty(plug->mq_list)) > return false; > > diff --git a/block/blk-mq.c b/block/blk-mq.c > index 15c7c5c4ad222..dc714dff73001 100644 > --- a/block/blk-mq.c > +++ b/block/blk-mq.c > @@ -2804,7 +2804,7 @@ static void bio_set_ioprio(struct bio *bio) > void blk_mq_submit_bio(struct bio *bio) > { > struct request_queue *q = bdev_get_queue(bio->bi_bdev); > - struct blk_plug *plug = blk_mq_plug(q, bio); > + struct blk_plug *plug = blk_mq_plug(bio); > const int is_sync = op_is_sync(bio->bi_opf); > struct request *rq; > unsigned int nr_segs = 1; > diff --git a/block/blk-mq.h b/block/blk-mq.h > index 31d75a83a562d..1cc0b17d69229 100644 > --- a/block/blk-mq.h > +++ b/block/blk-mq.h > @@ -294,7 +294,6 @@ static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) > > /* > * blk_mq_plug() - Get caller context plug > - * @q: request queue > * @bio : the bio being submitted by the caller context > * > * Plugging, by design, may delay the insertion of BIOs into the elevator in > @@ -305,23 +304,22 @@ static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) > * order. While this is not a problem with regular block devices, this ordering > * change can cause write BIO failures with zoned block devices as these > * require sequential write patterns to zones. Prevent this from happening by > - * ignoring the plug state of a BIO issuing context if the target request queue > - * is for a zoned block device and the BIO to plug is a write operation. > + * ignoring the plug state of a BIO issuing context if is for a zoned block s/if is/if it is/ > + 8 device and the BIO to plug is a write operation. s/8/* > * > * Return current->plug if the bio can be plugged and NULL otherwise > */ > -static inline struct blk_plug *blk_mq_plug(struct request_queue *q, > - struct bio *bio) > +static inline struct blk_plug *blk_mq_plug( struct bio *bio) > { > + /* Zoned block device write operation case: do not plug the BIO */ > + if (bdev_is_zoned(bio->bi_bdev) && op_is_write(bio_op(bio))) > + return NULL; > + > /* > * For regular block devices or read operations, use the context plug > * which may be NULL if blk_start_plug() was not executed. > */ > - if (!bdev_is_zoned(bio->bi_bdev) || !op_is_write(bio_op(bio))) > - return current->plug; > - > - /* Zoned block device write operation case: do not plug the BIO */ > - return NULL; > + return current->plug; > } > > /* Free all requests on the list */ With the typos fixed, looks good. Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
On 7/4/2022 5:44 AM, Christoph Hellwig wrote: > Drop the unused q argument, and invert the check to move the exception > into a branch and the regular path as the normal return. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- > with Damien's suggested comments : Reviewed-by : Chaitanya Kulkarni <kch@nvidia.com> -ck -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel
diff --git a/block/blk-core.c b/block/blk-core.c index 6bcca0b686de4..bc16e9bae2dc4 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -719,7 +719,7 @@ void submit_bio_noacct(struct bio *bio) might_sleep(); - plug = blk_mq_plug(q, bio); + plug = blk_mq_plug(bio); if (plug && plug->nowait) bio->bi_opf |= REQ_NOWAIT; diff --git a/block/blk-merge.c b/block/blk-merge.c index 0f5f42ebd0bb0..5abf5aa5a5f0e 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -1051,7 +1051,7 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, struct blk_plug *plug; struct request *rq; - plug = blk_mq_plug(q, bio); + plug = blk_mq_plug(bio); if (!plug || rq_list_empty(plug->mq_list)) return false; diff --git a/block/blk-mq.c b/block/blk-mq.c index 15c7c5c4ad222..dc714dff73001 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2804,7 +2804,7 @@ static void bio_set_ioprio(struct bio *bio) void blk_mq_submit_bio(struct bio *bio) { struct request_queue *q = bdev_get_queue(bio->bi_bdev); - struct blk_plug *plug = blk_mq_plug(q, bio); + struct blk_plug *plug = blk_mq_plug(bio); const int is_sync = op_is_sync(bio->bi_opf); struct request *rq; unsigned int nr_segs = 1; diff --git a/block/blk-mq.h b/block/blk-mq.h index 31d75a83a562d..1cc0b17d69229 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -294,7 +294,6 @@ static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) /* * blk_mq_plug() - Get caller context plug - * @q: request queue * @bio : the bio being submitted by the caller context * * Plugging, by design, may delay the insertion of BIOs into the elevator in @@ -305,23 +304,22 @@ static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) * order. While this is not a problem with regular block devices, this ordering * change can cause write BIO failures with zoned block devices as these * require sequential write patterns to zones. Prevent this from happening by - * ignoring the plug state of a BIO issuing context if the target request queue - * is for a zoned block device and the BIO to plug is a write operation. + * ignoring the plug state of a BIO issuing context if is for a zoned block + 8 device and the BIO to plug is a write operation. * * Return current->plug if the bio can be plugged and NULL otherwise */ -static inline struct blk_plug *blk_mq_plug(struct request_queue *q, - struct bio *bio) +static inline struct blk_plug *blk_mq_plug( struct bio *bio) { + /* Zoned block device write operation case: do not plug the BIO */ + if (bdev_is_zoned(bio->bi_bdev) && op_is_write(bio_op(bio))) + return NULL; + /* * For regular block devices or read operations, use the context plug * which may be NULL if blk_start_plug() was not executed. */ - if (!bdev_is_zoned(bio->bi_bdev) || !op_is_write(bio_op(bio))) - return current->plug; - - /* Zoned block device write operation case: do not plug the BIO */ - return NULL; + return current->plug; } /* Free all requests on the list */
Drop the unused q argument, and invert the check to move the exception into a branch and the regular path as the normal return. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/blk-core.c | 2 +- block/blk-merge.c | 2 +- block/blk-mq.c | 2 +- block/blk-mq.h | 18 ++++++++---------- 4 files changed, 11 insertions(+), 13 deletions(-)