Fix building issues on newer toolchains for GM8136

br-ext-chip-grainmedia/board/gm8136/kernel/gm8136.generic.config

@@ -912,7 +912,7 @@ CONFIG_SERIO_SERPORT=y
 #
 # CONFIG_VT is not set
 CONFIG_UNIX98_PTYS=y
-# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
+CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_SERIAL_NONSTANDARD is not set
 # CONFIG_N_GSM is not set
@@ -1600,7 +1600,7 @@ CONFIG_HAVE_ARCH_KGDB=y
 # CONFIG_KGDB is not set
 # CONFIG_TEST_KSTRTOX is not set
 # CONFIG_STRICT_DEVMEM is not set
-# CONFIG_ARM_UNWIND is not set
+CONFIG_ARM_UNWIND=y
 CONFIG_DEBUG_USER=y
 # CONFIG_DEBUG_LL is not set
 

br-ext-chip-grainmedia/board/gm8136/kernel/patches/01_fix_return_address_def.patch

@@ -0,0 +1,29 @@
+diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
+index f89515adac6..2bb8cac28b9 100644
+--- a/arch/arm/include/asm/ftrace.h
++++ b/arch/arm/include/asm/ftrace.h
+@@ -45,7 +45,7 @@ void *return_address(unsigned int);
+ 
+ #else
+ 
+-extern inline void *return_address(unsigned int level)
++static inline void *return_address(unsigned int level)
+ {
+ 	return NULL;
+ }
+diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
+index 2f8f523cece..a3b587ffc14 100755
+--- a/arch/arm/kernel/return_address.c
++++ b/arch/arm/kernel/return_address.c
+@@ -63,11 +63,6 @@ void *return_address(unsigned int level)
+ //#warning "TODO: return_address should use unwind tables"
+ //#endif
+ 
+-void *return_address(unsigned int level)
+-{
+-	return NULL;
+-}
+-
+ #endif /* if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) / else */
+ 
+ EXPORT_SYMBOL_GPL(return_address);