[RFC PATCH] crypto: flush poison data

[Christoph Hellwig]

On Tue, Jul 05, 2022 at 10:21:13AM +0200, LABBE Corentin wrote:
> 
> I just copied what did drivers/crypto/xilinx/zynqmp-sha.c.
> I tried to do flush_dcache_range() but it seems to not be implemented on riscV.

That driver is broken and should no have been merged in that form.

> And flush_dcache_page(virt_to_page(addr), len) produce a kernel panic.

And that's good so.  Drivers have no business doing their own cache
flushing.  That is the job of the dma-mapping implementation, so I'd
suggest to look for problems there.