As pointed by Laurent:
I think min_t(size_t, PAGE_SIZE, size) is the preferred way.
Thanks-to: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
                        goto nopage;
                if (PageHighMem(pages[i]))
                        goto highmem;
-               sg_set_page(&sglist[i], pages[i], min((unsigned)PAGE_SIZE, size), 0);
-               size -= min((unsigned)PAGE_SIZE, size);
+               sg_set_page(&sglist[i], pages[i], min_t(size_t, PAGE_SIZE, size), 0);
+               size -= min_t(size_t, PAGE_SIZE, size);
        }
        return sglist;