riscv: mm: Properly forward vmemmap_populate() altmap parameter

Make sure that the altmap parameter is properly passed on to
vmemmap_populate_hugepages().

Reviewed-by: Alexandre Ghiti <[email protected]>
Signed-off-by: Björn Töpel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: bjorn-rivos

arch/riscv/mm/init.c

@@ -1438,7 +1438,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
 	 * memory hotplug, we are not able to update all the page tables with
 	 * the new PMDs.
 	 */
-	return vmemmap_populate_hugepages(start, end, node, NULL);
+	return vmemmap_populate_hugepages(start, end, node, altmap);
 }
 #endif