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iov_iter: convert import_single_range() to ITER_UBUF

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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>
This commit is contained in:
Jens Axboe 2023-03-24 14:35:49 -06:00
parent 747b1f65d3
commit e03ad4ee27
1 changed files with 1 additions and 3 deletions
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4
lib/iov_iter.c
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@ -1870,9 +1870,7 @@ int import_single_range(int rw, void __user *buf, size_t len,
if (unlikely(!access_ok(buf, len))) if (unlikely(!access_ok(buf, len)))
return -EFAULT; return -EFAULT;
iov->iov_base = buf; iov_iter_ubuf(i, rw, buf, len);
iov->iov_len = len;
iov_iter_init(i, rw, iov, 1, len);
return 0; return 0;
} }
EXPORT_SYMBOL(import_single_range); EXPORT_SYMBOL(import_single_range);