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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-09-23 22:24:59 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-10-11 23:23:39 +0200 |
| commit | b282cc766958af161249b7b04d50e3eae12a2a1c (patch) | |
| tree | ac0f2291d2e4a304ffe851736d594c7778cf5ad8 /block | |
| parent | bio_map_user_iov(): move alignment check into the main loop (diff) | |
| download | linux-b282cc766958af161249b7b04d50e3eae12a2a1c.tar.xz linux-b282cc766958af161249b7b04d50e3eae12a2a1c.zip | |
bio_map_user_iov(): get rid of the iov_for_each()
Use iov_iter_npages()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/bio.c | 21 |
1 files changed, 2 insertions, 19 deletions
diff --git a/block/bio.c b/block/bio.c index d851f68727f1..d1ca7eecc8aa 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1324,32 +1324,15 @@ struct bio *bio_map_user_iov(struct request_queue *q, gfp_t gfp_mask) { int j; - int nr_pages = 0; struct bio *bio; int ret; struct iov_iter i; - struct iovec iov; struct bio_vec *bvec; - iov_for_each(iov, i, *iter) { - unsigned long uaddr = (unsigned long) iov.iov_base; - unsigned long len = iov.iov_len; - unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; - unsigned long start = uaddr >> PAGE_SHIFT; - - /* - * Overflow, abort - */ - if (end < start) - return ERR_PTR(-EINVAL); - - nr_pages += end - start; - } - - if (!nr_pages) + if (!iov_iter_count(iter)) return ERR_PTR(-EINVAL); - bio = bio_kmalloc(gfp_mask, nr_pages); + bio = bio_kmalloc(gfp_mask, iov_iter_npages(iter, BIO_MAX_PAGES)); if (!bio) return ERR_PTR(-ENOMEM); |