iov_iter: convert import_single_range() to ITER_UBUF
Since we're just importing a single vector, we don't have to turn it into an ITER_IOVEC. Instead turn it into an ITER_UBUF, which is cheaper to iterate. Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -1870,9 +1870,7 @@ int import_single_range(int rw, void __user *buf, size_t len,
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if (unlikely(!access_ok(buf, len)))
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return -EFAULT;
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iov->iov_base = buf;
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iov->iov_len = len;
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iov_iter_init(i, rw, iov, 1, len);
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iov_iter_ubuf(i, rw, buf, len);
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return 0;
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}
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EXPORT_SYMBOL(import_single_range);
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