add missing accounting calls to compat_sys_{readv,writev}

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/compat.c b/fs/compat.c
index d1ece79..30f2faa 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1187,6 +1187,9 @@
 	ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
 
 out:
+	if (ret > 0)
+		add_rchar(current, ret);
+	inc_syscr(current);
 	fput(file);
 	return ret;
 }
@@ -1210,6 +1213,9 @@
 	ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
 
 out:
+	if (ret > 0)
+		add_wchar(current, ret);
+	inc_syscw(current);
 	fput(file);
 	return ret;
 }