linux-veyron: add support for gcc6

Signed-off-by: Trevor Woerner <twoerner@gmail.com>

recipes-kernel/linux/linux-veyron/0001-add-support-for-gcc6.patch

@@ -0,0 +1,86 @@
+From 8c1cc93719587418bb95e6d11aab0171d56ebd32 Mon Sep 17 00:00:00 2001
+From: Trevor Woerner <twoerner@gmail.com>
+Date: Tue, 10 Apr 2018 01:24:37 -0400
+Subject: [PATCH] add support for gcc6
+
+Signed-off-by: Trevor Woerner <twoerner@gmail.com>
+---
+ include/linux/compiler-gcc6.h | 66 +++++++++++++++++++++++++++++++++++
+ 1 file changed, 66 insertions(+)
+ create mode 100644 include/linux/compiler-gcc6.h
+
+diff --git a/include/linux/compiler-gcc6.h b/include/linux/compiler-gcc6.h
+new file mode 100644
+index 000000000000..cdd1cc202d51
+--- /dev/null
++++ b/include/linux/compiler-gcc6.h
+@@ -0,0 +1,66 @@
++#ifndef __LINUX_COMPILER_H
++#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead."
++#endif
++
++#define __used				__attribute__((__used__))
++#define __must_check			__attribute__((warn_unused_result))
++#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
++
++/* Mark functions as cold. gcc will assume any path leading to a call
++   to them will be unlikely.  This means a lot of manual unlikely()s
++   are unnecessary now for any paths leading to the usual suspects
++   like BUG(), printk(), panic() etc. [but let's keep them for now for
++   older compilers]
++
++   Early snapshots of gcc 4.3 don't support this and we can't detect this
++   in the preprocessor, but we can live with this because they're unreleased.
++   Maketime probing would be overkill here.
++
++   gcc also has a __attribute__((__hot__)) to move hot functions into
++   a special section, but I don't see any sense in this right now in
++   the kernel context */
++#define __cold			__attribute__((__cold__))
++
++#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
++
++#ifndef __CHECKER__
++# define __compiletime_warning(message) __attribute__((warning(message)))
++# define __compiletime_error(message) __attribute__((error(message)))
++#endif /* __CHECKER__ */
++
++/*
++ * Mark a position in code as unreachable.  This can be used to
++ * suppress control flow warnings after asm blocks that transfer
++ * control elsewhere.
++ *
++ * Early snapshots of gcc 4.5 don't support this and we can't detect
++ * this in the preprocessor, but we can live with this because they're
++ * unreleased.  Really, we need to have autoconf for the kernel.
++ */
++#define unreachable() __builtin_unreachable()
++
++/* Mark a function definition as prohibited from being cloned. */
++#define __noclone	__attribute__((__noclone__))
++
++/*
++ * Tell the optimizer that something else uses this function or variable.
++ */
++#define __visible __attribute__((externally_visible))
++
++/*
++ * GCC 'asm goto' miscompiles certain code sequences:
++ *
++ *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
++ *
++ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
++ * Fixed in GCC 4.8.2 and later versions.
++ *
++ * (asm goto is automatically volatile - the naming reflects this.)
++ */
++#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
++
++#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
++#define __HAVE_BUILTIN_BSWAP32__
++#define __HAVE_BUILTIN_BSWAP64__
++#define __HAVE_BUILTIN_BSWAP16__
++#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
+-- 
+2.17.0.rc2.3.gc2a499e6c
+

recipes-kernel/linux/linux-veyron_3.14.0.bb

@@ -11,6 +11,7 @@ SRC_URI = "git://chromium.googlesource.com/chromiumos/third_party/kernel;protoco
 	file://0002-mwifiex-do-not-create-AP-and-P2P-interfaces-upon-dri.patch \
 	file://0003-UPSTREAM-soc-rockchip-add-handler-for-usb-uart-funct.patch \
 	file://0004-fix-brcmfmac-oops-and-race-condition.patch \
+	file://0001-add-support-for-gcc6.patch \
 	file://defconfig"
 SRCREV = "6fa09265d61db1c29203c8194badebcfee86d97f"