[PATCH 1/9] block: move the BIO_NO_PAGE_REF check into bio_release_pages

Christoph Hellwig
2019-06-26T13:49:35Z

Move the BIO_NO_PAGE_REF check into bio_release_pages instead of
duplicating it in both callers.

Also make the function available outside of bio.c so that we can
reuse it in other direct I/O implementations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
block/bio.c | 11 ++++++-----
include/linux/bio.h | 1 +
2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index ad9c3aa9bf7d..9bc7d28ae997 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -845,11 +845,14 @@ static void bio_get_pages(struct bio *bio)
get_page(bvec->bv_page);
}

-static void bio_release_pages(struct bio *bio)
+void bio_release_pages(struct bio *bio)
{
struct bvec_iter_all iter_all;
struct bio_vec *bvec;

+ if (bio_flagged(bio, BIO_NO_PAGE_REF))
+ return;
+
bio_for_each_segment_all(bvec, bio, iter_all)
put_page(bvec->bv_page);
}
@@ -1681,8 +1684,7 @@ static void bio_dirty_fn(struct work_struct *work)
next = bio->bi_private;

bio_set_pages_dirty(bio);
- if (!bio_flagged(bio, BIO_NO_PAGE_REF))
- bio_release_pages(bio);
+ bio_release_pages(bio);
bio_put(bio);
}
}
@@ -1698,8 +1700,7 @@ void bio_check_pages_dirty(struct bio *bio)
goto defer;
}

- if (!bio_flagged(bio, BIO_NO_PAGE_REF))
- bio_release_pages(bio);
+ bio_release_pages(bio);
bio_put(bio);
return;
defer:
diff --git a/include/linux/bio.h b/include/linux/bio.h
index ee11c4324751..87e6c8637bce 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -426,6 +426,7 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page,
void __bio_add_page(struct bio *bio, struct page *page,
unsigned int len, unsigned int off);
int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
+void bio_release_pages(struct bio *bio);
struct rq_map_data;
extern struct bio *bio_map_user_iov(struct request_queue *,
struct iov_iter *, gfp_t);
--
2.20.1