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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-03-19 01:16:16 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-05-06 17:32:52 -0400 |
| commit | f67da30c1d5fc9e341bc8121708874bfd7b31e45 (patch) | |
| tree | 504966ed27e82dbcbe31786c9a0851a4ae79ef3e /fs/fuse | |
| parent | 5b46f25ddc6edf4adff1a137d453da542c27a640 (diff) | |
| download | linux-f67da30c1d5fc9e341bc8121708874bfd7b31e45.tar.bz2 | |
new helper: iov_iter_npages()
counts the pages covered by iov_iter, up to given limit.
do_block_direct_io() and fuse_iter_npages() switched to
it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/file.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 7db564d18dc6..7026014717bc 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1310,7 +1310,7 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii, while (nbytes < *nbytesp && req->num_pages < req->max_pages) { unsigned npages; - size_t start, end, frag_size; + size_t start; unsigned n = req->max_pages - req->num_pages; ssize_t ret = iov_iter_get_pages(ii, &req->pages[req->num_pages], @@ -1344,19 +1344,7 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii, static inline int fuse_iter_npages(const struct iov_iter *ii_p) { - struct iov_iter ii = *ii_p; - int npages = 0; - - while (iov_iter_count(&ii) && npages < FUSE_MAX_PAGES_PER_REQ) { - unsigned long user_addr = fuse_get_user_addr(&ii); - unsigned offset = user_addr & ~PAGE_MASK; - size_t frag_size = iov_iter_single_seg_count(&ii); - - npages += (frag_size + offset + PAGE_SIZE - 1) >> PAGE_SHIFT; - iov_iter_advance(&ii, frag_size); - } - - return min(npages, FUSE_MAX_PAGES_PER_REQ); + return iov_iter_npages(ii_p, FUSE_MAX_PAGES_PER_REQ); } ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, |