Comment # 4 on bug 1217010 from Petr Vorel

(In reply to Petr Vorel from comment #2)
> aa5b9178c019 ("mm: invalidation check mapping before folio_contains")
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/
> ?id=e88e0d366f9cfbb810b0c8509dc5d130d5a53e02

I overlook in the commit message, that author itself noticed tests failing on
tmpfs:

        dio01 through dio30, except for dio04 and dio10, which fail because
        tmpfs dio read and write allow odd count: tmpfs could be made stricter,
        but would that be an improvement?

@Jan, reading your ack on v1 [1] and also on v2 [2] (where you maintainers
discussed only amount of code duplication and not the fact that LTP tests
failing, I suppose implementation is accepted and we need to make test on tmpfs
less strict, right?

[1] https://lore.kernel.org/all/20230809095447.7iturpglkvbzyvmg@quack3/
[2] https://lore.kernel.org/all/20230811085632.hfmdzni2yzgmcy44@quack3/