Re: [PATCH v4 13/14] rxrpc: Prepare to remove VLA usage for SKCIPHER_REQUEST_ON_STACK

Arnd Bergmann [off-list ref] wrote:

From what I can tell, neither of the two are called in atomic context, so
you should be able to use a GFP_KERNEL allocation.

You need to be careful doing that since the allocation might happen in the AFS
writeback path.  I use GFP_NOIO or GFP_NOFS in rxkad.c and skb_cow_data() uses
GFP_ATOMIC - though we should have single ownership of the packet at this
point.

David