Revert "UBUNTU: SAUCE: Remove setup.h include file otherwise compilation...

Revert "UBUNTU: SAUCE: Remove setup.h include file otherwise compilation complains about missing header file."

This reverts commit 4fc2e0b5.

CVE-2017-5754

BugLink: http://bugs.launchpad.net/bugs/1756121Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

arch/powerpc/kernel/sysfs.c

@@ -21,6 +21,7 @@
 #include <asm/ppc_asm.h>
 
 #include "cacheinfo.h"
+#include "setup.h"
 
 #ifdef CONFIG_PPC64
 #include <asm/paca.h>
@@ -498,7 +499,6 @@ static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
 static DEVICE_ATTR(pir, 0400, show_pir, NULL);
 
 #ifdef CONFIG_PPC_BOOK3S_64
-extern bool rfi_flush;
 static ssize_t show_rfi_flush(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {