On Mon, Dec 11, 2023 at 11:38:01PM -0800, Vivek Kasireddy wrote:
> @@ -42,7 +42,7 @@ static vm_fault_t udmabuf_vm_fault(struct vm_fault *vmf)
> if (pgoff >= ubuf->pagecount)
> return VM_FAULT_SIGBUS;
>
> - pfn = page_to_pfn(ubuf->pages[pgoff]);
> + pfn = page_to_pfn(&u
This is mainly a preparatory patch to use memfd_pin_folios() API
for pinning folios. Using folios instead of pages makes sense as
the udmabuf driver needs to handle both shmem and hugetlb cases.
However, the function vmap_udmabuf() still needs a list of pages;
so, we collect all the head pages into
