iov_iter: reduce code duplication
authorAl Viro <viro@zeniv.linux.org.uk>
Wed, 28 Nov 2018 03:32:59 +0000 (22:32 -0500)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 28 Nov 2018 03:35:08 +0000 (22:35 -0500)
commitf91528955d0094ff2200632661d62ee64019c985
treeba4bf0f9187672c911f2297f86a536b3b74e45e0
parent78e1f386170798159a81fdbc5e131836fd808048
iov_iter: reduce code duplication

The same combination of csum_partial_copy_nocheck() with csum_add_block()
is used in a bunch of places.  Add a helper doing just that and use it.

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