[PATCH v2 2/2] treewide: Add the __GFP_PACKED flag to several non-DMA kmalloc() allocations

[Greg Kroah-Hartman]

On Sun, Oct 30, 2022 at 09:47:18AM +0100, Christoph Hellwig wrote:
> On Fri, Oct 28, 2022 at 11:37:52AM +0200, Greg Kroah-Hartman wrote:
> > And here's actually the patch...
> 
> How is this supposed to work?  noderef means any dereference of it will
> now make sparse complain.  And the whole point of the DMA is to get
> data into and out of the system, so except for corner cases like direct
> DMA to userspace (which won't use kmalloc) we absolutely do want to
> derference it to generate or consume the information.

Ah, my fault, sorry, you are right.  Is there a sparse tag that just
means "enforce this void * type?"  I guess we could do that with something
like:
	typedef void *dmaptr;

but that feels icky.