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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-01-29 07:38:57 +0300
committerJens Axboe <axboe@kernel.dk>2021-02-27 01:49:51 +0300
commit5f7136db82996089cdfb2939c7664b29e9da141d (patch)
treef6fb9ac2dafb2ca03002f6c86bc0fb1062fadcfa /block
parent94d4bffdda21baa2c749bc229c41811a7559dd15 (diff)
downloadlinux-5f7136db82996089cdfb2939c7664b29e9da141d.tar.xz
block: Add bio_max_segs
It's often inconvenient to use BIO_MAX_PAGES due to min() requiring the sign to be the same. Introduce bio_max_segs() and change BIO_MAX_PAGES to be unsigned to make it easier for the users. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-map.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/block/blk-map.c b/block/blk-map.c
index 21630dccac62..369e204d14d0 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -150,9 +150,7 @@ static int bio_copy_user_iov(struct request *rq, struct rq_map_data *map_data,
bmd->is_our_pages = !map_data;
bmd->is_null_mapped = (map_data && map_data->null_mapped);
- nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE);
- if (nr_pages > BIO_MAX_PAGES)
- nr_pages = BIO_MAX_PAGES;
+ nr_pages = bio_max_segs(DIV_ROUND_UP(offset + len, PAGE_SIZE));
ret = -ENOMEM;
bio = bio_kmalloc(gfp_mask, nr_pages);