kill iov_iter_copy_from_user()

all callers can use copy_page_from_iter() and it actually simplifies
them.

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

1 files changed, 1 insertions, 5 deletions

diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c
index 8505c9262b35..f32b1fbbfe69 100644
--- a/mm/process_vm_access.c
+++ b/mm/process_vm_access.c
@@ -46,11 +46,7 @@ static int process_vm_rw_pages(struct page **pages,
                         copy = len;
 
                 if (vm_write) {
-                        if (copy > iov_iter_count(iter))
-                                copy = iov_iter_count(iter);
-                        copied = iov_iter_copy_from_user(page, iter,
-                                        offset, copy);
-                        iov_iter_advance(iter, copied);
+                        copied = copy_page_from_iter(page, offset, copy, iter);
                         set_page_dirty_lock(page);
                 } else {
                         copied = copy_page_to_iter(page, offset, copy, iter);