Re: [PATCH v6 7/9] dma-buf: system_heap: Enforce shared-granule alignment for cc-shared buffers

[Jason Gunthorpe <jgg@ziepe.ca>]

On Sat, Sep 19, 2026 at 08:27:29PM +0530, Aneesh Kumar K.V wrote:
 
> +static struct page *system_heap_alloc_order(unsigned int order, gfp_t flags,
> +					    bool cc_shared)
> +{
> +	struct cc_shared_pages mem;
> +
> +	if (!cc_shared)
> +		return alloc_pages(flags, order);
> +
> +	/* The shared granule can raise the actual allocation order. */
> +	flags |= __GFP_COMP;
> +	if (alloc_cc_shared_pages(flags, PAGE_SIZE << order, &mem))
> +		return NULL;

Oh yeah that's surprisingly easy because of how this loop works with
order

Makes sense to me

> int alloc_cc_shared_pages_node(int nid, gfp_t gfp, size_t requested,
> 			       struct cc_shared_pages *mem)

This argument order is a little weird from mm norms?

Jason