it'll die soon enough - now that kvec-backed iov_iter works regardless
of set_fs(), both instances will become copy_from_iter() as soon as
we introduce ->msg_iter...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
                                               unsigned long len, int nb);
        int                     (*memcpy_fromiovec) (struct l2cap_chan *chan,
                                                     unsigned char *kdata,
-                                                    struct iovec *iov,
+                                                    struct msghdr *msg,
                                                     int len);
 };
 
 
 static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan,
                                                 unsigned char *kdata,
-                                                struct iovec *iov,
+                                                struct msghdr *msg,
                                                 int len)
 {
        /* Following is safe since for compiler definitions of kvec and
         * iovec are identical, yielding the same in-core layout and alignment
         */
-       struct kvec *vec = (struct kvec *)iov;
+       struct kvec *vec = (struct kvec *)msg->msg_iov;
 
        while (len > 0) {
                if (vec->iov_len) {
 
        int sent = 0;
 
        if (chan->ops->memcpy_fromiovec(chan, skb_put(skb, count),
-                                       msg->msg_iov, count))
+                                       msg, count))
                return -EFAULT;
 
        sent += count;
                *frag = tmp;
 
                if (chan->ops->memcpy_fromiovec(chan, skb_put(*frag, count),
-                                               msg->msg_iov, count))
+                                               msg, count))
                        return -EFAULT;
 
                sent += count;
 
 
 static int l2cap_sock_memcpy_fromiovec_cb(struct l2cap_chan *chan,
                                          unsigned char *kdata,
-                                         struct iovec *iov, int len)
+                                         struct msghdr *msg, int len)
 {
-       return memcpy_fromiovec(kdata, iov, len);
+       return memcpy_from_msg(kdata, msg, len);
 }
 
 static void l2cap_sock_ready_cb(struct l2cap_chan *chan)