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Replace this with ioremap.patch .

diff -up ./arch/x86/mm/ioremap.c.ioremap ./arch/x86/mm/ioremap.c
--- ./arch/x86/mm/ioremap.c.ioremap	2018-10-05 05:18:19.000000000 +0900
+++ ./arch/x86/mm/ioremap.c	2018-10-30 22:59:42.000000000 +0900
@@ -167,7 +167,7 @@ static void __iomem *__ioremap_caller(re
 	 */
 	if (mem_flags.system_ram) {
 		WARN_ONCE(1, "ioremap on RAM at 0x%llx - 0x%llx\n",
-					phys_addr, last_addr);
+					(unsigned long long)phys_addr, (unsigned long long)last_addr);
 		return NULL;
 	}