linux-raspberrypi: Fix v4.1 with GCC6

Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>

recipes-kernel/linux/linux-raspberrypi-4.1/0002-vmcs-Remove-unused-sm_cache_map_vector-definition.patch

@@ -0,0 +1,31 @@
+The code using it also ifdef'ed with 0, anyyd gcc 6
+complains
+
+error: 'sm_cache_map_vector' defined but not used
+
+The code using it also ifdef'ed out
+
+Upstream-status: Denied [https://github.com/raspberrypi/linux/pull/1528]
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ drivers/char/broadcom/vc_sm/vmcs_sm.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/char/broadcom/vc_sm/vmcs_sm.c
++++ b/drivers/char/broadcom/vc_sm/vmcs_sm.c
+@@ -197,12 +197,14 @@ struct SM_STATE_T {
+ static struct SM_STATE_T *sm_state;
+ static int sm_inited;
+ 
++#if 0
+ static const char *const sm_cache_map_vector[] = {
+ 	"(null)",
+ 	"host",
+ 	"videocore",
+ 	"host+videocore",
+ };
++#endif
+ 
+ /* ---- Private Function Prototypes -------------------------------------- */
+ 

recipes-kernel/linux/linux-raspberrypi-4.1/0003-fix-gcc6.patch

@@ -0,0 +1,78 @@
+Fix compile with GCC6
+
+Upstream-status: Denied [https://github.com/raspberrypi/linux/pull/1528]
+
+Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
+
+Index: source/include/linux/compiler-gcc6.h
+===================================================================
+--- /dev/null
++++ source/include/linux/compiler-gcc6.h
+@@ -0,0 +1,67 @@
++#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.
++ *
++ * (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 */
++
++#define KASAN_ABI_VERSION 4

recipes-kernel/linux/linux-raspberrypi_4.1.bb

@@ -5,6 +5,8 @@ LINUX_VERSION ?= "4.1.21"
 SRCREV = "ff45bc0e8917c77461b2901e2743e6339bb70413"
 SRC_URI = "git://github.com/raspberrypi/linux.git;protocol=git;branch=rpi-4.1.y \
            file://0001-dts-add-overlay-for-pitft22.patch \
+           file://0002-vmcs-Remove-unused-sm_cache_map_vector-definition.patch \
+           file://0003-fix-gcc6.patch \
           "
 
 require linux-raspberrypi.inc