zfs_uiomove_iter: ignore the "skip" offset

For UIO_ITER, we are just wrapping a kernel iterator. It will take care
of its own offsets; doing skips of our own just leads to the kernel
running off the end of the iterator later.

Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>

Author: robn

module/os/linux/zfs/zfs_uio.c

@@ -233,9 +233,6 @@ zfs_uiomove_iter(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio,
 {
 	size_t cnt = MIN(n, uio->uio_resid);
 
-	if (uio->uio_skip)
-		iov_iter_advance(uio->uio_iter, uio->uio_skip);
-
 	if (rw == UIO_READ)
 		cnt = copy_to_iter(p, cnt, uio->uio_iter);
 	else