--- zzzz-none-000/linux-3.10.107/arch/powerpc/mm/dma-noncoherent.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/mm/dma-noncoherent.c	2021-02-04 17:41:59.000000000 +0000
@@ -33,6 +33,7 @@
 #include <linux/export.h>
 
 #include <asm/tlbflush.h>
+#include <asm/dma.h>
 
 #include "mmu_decl.h"
 
@@ -227,7 +228,7 @@
 		do {
 			SetPageReserved(page);
 			map_page(vaddr, page_to_phys(page),
-				 pgprot_noncached(PAGE_KERNEL));
+				 pgprot_val(pgprot_noncached(PAGE_KERNEL)));
 			page++;
 			vaddr += PAGE_SIZE;
 		} while (size -= PAGE_SIZE);
@@ -287,9 +288,7 @@
 			pte_clear(&init_mm, addr, ptep);
 			if (pfn_valid(pfn)) {
 				struct page *page = pfn_to_page(pfn);
-
-				ClearPageReserved(page);
-				__free_page(page);
+				__free_reserved_page(page);
 			}
 		}
 		addr += PAGE_SIZE;