On Thu, Dec 14, 2023 at 12:24:44AM +0100, Ilya Leoshkevich wrote:
> stcctm() uses the "Q" constraint for dest, therefore KMSAN does not
> understand that it fills multiple doublewords pointed to by dest, not
> just one. This results in false positives.
> 
> Unpoison the whole dest manually with kmsan_unpoison_memory().
> 
> Reported-by: Alexander Gordeev <[email protected]>
> Signed-off-by: Ilya Leoshkevich <[email protected]>
> ---
>  arch/s390/include/asm/cpu_mf.h | 6 ++++++
>  1 file changed, 6 insertions(+)

Acked-by: Heiko Carstens <[email protected]>

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