diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-01-29 05:38:57 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-02-26 23:49:51 +0100 |
| commit | 5f7136db82996089cdfb2939c7664b29e9da141d (patch) | |
| tree | f6fb9ac2dafb2ca03002f6c86bc0fb1062fadcfa /drivers/block/xen-blkback/blkback.c | |
| parent | blktrace: fix documentation for blk_fill_rw() (diff) | |
| download | linux-5f7136db82996089cdfb2939c7664b29e9da141d.tar.xz linux-5f7136db82996089cdfb2939c7664b29e9da141d.zip | |
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 'drivers/block/xen-blkback/blkback.c')
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index da16121140ca..1cdf09ff67b6 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -1326,9 +1326,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring, pages[i]->page, seg[i].nsec << 9, seg[i].offset) == 0)) { - - int nr_iovecs = min_t(int, (nseg-i), BIO_MAX_PAGES); - bio = bio_alloc(GFP_KERNEL, nr_iovecs); + bio = bio_alloc(GFP_KERNEL, bio_max_segs(nseg - i)); if (unlikely(bio == NULL)) goto fail_put_bio; |