Buggy commit tracked to: "Re: [PATCH 2/9] iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c"

[David Laight]

From: Greg KH
> Sent: 22 October 2020 10:02
...
> I'm running some more tests, trying to narrow things down as just adding
> a "noinline" to the function that got moved here doesn't work on Linus's
> tree at the moment because the function was split into multiple
> functions.

I was going to look at that once rc2 is in - and the kernel is
likely to work.

I suspect the split version doesn't get inlined the same way?
Which leaves the horrid argument conversion the inline got
rid of back there again.

Which all rather begs the question of why the compiler doesn't
generate the expected code.

	David

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