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SubjectRe: [RFC] situation with csum_and_copy_... API
	OK, here's the next bunch.  Sorry about the delay, iov_iter.c stuff
took most of the day (and it's not included in this pile). Please, review.
Al Viro (17):
new helper: skb_copy_and_csum_datagram_msg()
new helper: memcpy_from_msg()
switch ipxrtr_route_packet() from iovec to msghdr
new helper: memcpy_to_msg()
switch drivers/net/tun.c to ->read_iter()
switch macvtap to ->read_iter()
new helpers: skb_copy_datagram_from_iter() and zerocopy_sg_from_iter()
{macvtap,tun}_get_user(): switch to iov_iter
kill zerocopy_sg_from_iovec()
switch AF_PACKET and AF_UNIX to skb_copy_datagram_from_iter()
switch sctp_user_addto_chunk() and sctp_datamsg_from_user() to passing iov_iter
tipc_sendmsg(): pass msghdr instead of its ->msg_iov
tipc_msg_build(): pass msghdr instead of its ->msg_iov
vmci_transport: switch ->enqeue_dgram, ->enqueue_stream and ->dequeue_stream to msghdr
[atm] switch vcc_sendmsg() to copy_from_iter()
rds: switch ->inc_copy_to_user() to passing iov_iter
rds: switch rds_message_copy_from_user() to iov_iter

Patches themselves are in followups...

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