On Mon, Mar 27, 2023 at 2:16 PM Arnd Bergmann [off-list ref] wrote:

From: Arnd Bergmann <arnd@arndb.de>

Most ARM CPUs can have write-back caches and that require
cache management to be done in the dma_sync_*_for_device()
operation. This is typically done in both writeback and
writethrough mode.

The cache-v4.S (arm720/740/7tdmi/9tdmi) and cache-v4wt.S
(arm920t, arm940t) implementations are the exception here,
and only do the cache management after the DMA is complete,
in the dma_sync_*_for_cpu() operation.

Change this for consistency with the other platforms. This
should have no user visible effect.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Looks good to me.
Reviewed-by: Linus Walleij <redacted>

Yours,
Linus Walleij