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Pull ITER_UBUF updates from Jens Axboe: "This turns singe vector imports into ITER_UBUF, rather than ITER_IOVEC. The former is more trivial to iterate and advance, and hence a bit more efficient. From some very unscientific testing, ~60% of all iovec imports are single vector" * tag 'iter-ubuf.2-2023-04-21' of git://git.kernel.dk/linux: iov_iter: Mark copy_compat_iovec_from_user() noinline iov_iter: import single vector iovecs as ITER_UBUF iov_iter: convert import_single_range() to ITER_UBUF iov_iter: overlay struct iovec and ubuf/len iov_iter: set nr_segs = 1 for ITER_UBUF iov_iter: remove iov_iter_iovec() iov_iter: add iter_iov_addr() and iter_iov_len() helpers ALSA: pcm: check for user backed iterator, not specific iterator type IB/qib: check for user backed iterator, not specific iterator type IB/hfi1: check for user backed iterator, not specific iterator type iov_iter: add iter_iovec() helper block: ensure bio_alloc_map_data() deals with ITER_UBUF correctly