get rid of pointless iov_length() in ->direct_IO()

all callers have iov_length(iter->iov, iter->nr_segs) == iov_iter_count(iter)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 7 deletions

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 21723149668b..1d34f454989e 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -486,9 +486,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, struct iov_iter *iter,
         struct nfs_direct_req *dreq;
         struct nfs_lock_context *l_ctx;
         ssize_t result = -EINVAL;
-        size_t count;
-
-        count = iov_length(iter->iov, iter->nr_segs);
+        size_t count = iov_iter_count(iter);
         nfs_add_stats(mapping->host, NFSIOS_DIRECTREADBYTES, count);
 
         dfprintk(FILE, "NFS: direct read(%pD2, %zd@%Ld)\n",
@@ -877,7 +875,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
         get_dreq(dreq);
         atomic_inc(&inode->i_dio_count);
 
-        NFS_I(dreq->inode)->write_io += iov_length(iter->iov, iter->nr_segs);
+        NFS_I(dreq->inode)->write_io += iov_iter_count(iter);
         for (seg = 0; seg < iter->nr_segs; seg++) {
                 const struct iovec *vec = &iter->iov[seg];
                 result = nfs_direct_write_schedule_segment(&desc, vec, pos, uio);
@@ -936,9 +934,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter,
         struct nfs_direct_req *dreq;
         struct nfs_lock_context *l_ctx;
         loff_t end;
-        size_t count;
-
-        count = iov_length(iter->iov, iter->nr_segs);
+        size_t count = iov_iter_count(iter);
         end = (pos + count - 1) >> PAGE_CACHE_SHIFT;
 
         nfs_add_stats(mapping->host, NFSIOS_DIRECTWRITTENBYTES, count);