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>

2 files changed, 5 insertions, 5 deletions

diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index eb5ae16902d0..123898a6af05 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -647,7 +647,7 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
         handle_t *handle;
         ssize_t ret;
         int orphan = 0;
-        size_t count = iov_length(iter->iov, iter->nr_segs);
+        size_t count = iov_iter_count(iter);
         int retries = 0;
 
         if (rw == WRITE) {
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 29996c1b673e..2b993579a968 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3090,7 +3090,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
         struct file *file = iocb->ki_filp;
         struct inode *inode = file->f_mapping->host;
         ssize_t ret;
-        size_t count = iov_length(iter->iov, iter->nr_segs);
+        size_t count = iov_iter_count(iter);
         int overwrite = 0;
         get_block_t *get_block_func = NULL;
         int dio_flags = 0;
@@ -3225,6 +3225,7 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
 {
         struct file *file = iocb->ki_filp;
         struct inode *inode = file->f_mapping->host;
+        size_t count = iov_iter_count(iter);
         ssize_t ret;
 
         /*
@@ -3237,13 +3238,12 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
         if (ext4_has_inline_data(inode))
                 return 0;
 
-        trace_ext4_direct_IO_enter(inode, offset, iov_length(iter->iov, iter->nr_segs), rw);
+        trace_ext4_direct_IO_enter(inode, offset, count, rw);
         if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
                 ret = ext4_ext_direct_IO(rw, iocb, iter, offset);
         else
                 ret = ext4_ind_direct_IO(rw, iocb, iter, offset);
-        trace_ext4_direct_IO_exit(inode, offset,
-                                iov_length(iter->iov, iter->nr_segs), rw, ret);
+        trace_ext4_direct_IO_exit(inode, offset, count, rw, ret);
         return ret;
 }