diff -urN linux-4.2.orig/arch/x86/Kconfig linux-4.2/arch/x86/Kconfig
--- linux-4.2.orig/arch/x86/Kconfig	2015-10-05 08:56:58.933313678 +0200
+++ linux-4.2/arch/x86/Kconfig	2015-10-05 09:00:00.916306025 +0200
@@ -1282,6 +1282,7 @@
 config X86_PAE
 	bool "PAE (Physical Address Extension) Support"
 	depends on X86_32 && !HIGHMEM4G
+	select SWIOTLB
 	---help---
 	  PAE is required for NX support, and furthermore enables
 	  larger swapspace support for non-overcommit purposes. It

Signed-off-by: Christian Melki <christian.melki@t2data.com>