--- /dev/null
+From 8c5477e8046ca139bac250386c08453da37ec1ae Mon Sep 17 00:00:00 2001
+From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
+Date: Tue, 16 Jul 2019 21:18:12 +0800
+Subject: x86, boot: Remove multiple copy of static function sanitize_boot_params()
+
+From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
+
+commit 8c5477e8046ca139bac250386c08453da37ec1ae upstream.
+
+Kernel build warns:
+ 'sanitize_boot_params' defined but not used [-Wunused-function]
+
+at below files:
+ arch/x86/boot/compressed/cmdline.c
+ arch/x86/boot/compressed/error.c
+ arch/x86/boot/compressed/early_serial_console.c
+ arch/x86/boot/compressed/acpi.c
+
+That's becausethey each include misc.h which includes a definition of
+sanitize_boot_params() via bootparam_utils.h.
+
+Remove the inclusion from misc.h and have the c file including
+bootparam_utils.h directly.
+
+Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Link: https://lkml.kernel.org/r/1563283092-1189-1-git-send-email-zhenzhong.duan@oracle.com
+[nc: Fixed conflict around lack of 67b6662559f7f]
+Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/boot/compressed/misc.c | 1 +
+ arch/x86/boot/compressed/misc.h | 1 -
+ 2 files changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/x86/boot/compressed/misc.c
++++ b/arch/x86/boot/compressed/misc.c
+@@ -11,6 +11,7 @@
+
+ #include "misc.h"
+ #include "../string.h"
++#include <asm/bootparam_utils.h>
+
+ /* WARNING!!
+ * This code is compiled with -fPIC and it is relocated dynamically
+--- a/arch/x86/boot/compressed/misc.h
++++ b/arch/x86/boot/compressed/misc.h
+@@ -19,7 +19,6 @@
+ #include <asm/page.h>
+ #include <asm/boot.h>
+ #include <asm/bootparam.h>
+-#include <asm/bootparam_utils.h>
+
+ #define BOOT_BOOT_H
+ #include "../ctype.h"