Re: [PATCH ath-next] wifi: ath9k: Clear DMA descriptors without memset

[Toke Høiland-Jørgensen]

Rosen Penev <rosenp@xxxxxxxxx> writes:

> Clear ath9k DMA descriptors with explicit status word stores instead of
> memset(). The descriptor rings are coherent DMA memory, which may be
> mapped uncached on 32-bit powerpc. The optimized memset() path can use
> dcbz there and trigger an alignment warning.
>
> Use WRITE_ONCE() for the descriptor status words so the compiler keeps
> the clears as ordinary stores instead of folding them back into bulk
> memset(). This covers AR9003 TX status descriptors as well as the RX
> status area cleared when setting up RX descriptors.
>
> Assisted-by: Codex:GPT-5.5
> Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>

Acked-by: Toke Høiland-Jørgensen <toke@xxxxxxx>