kabi: Introduce CONFIG_KABI_RESERVE

Disable for images if kabi compatibility is explicitly not needed.

Signed-off-by: Lugang He <helugang@uniontech.com>
Signed-off-by: WangYuli <wangyuli@uniontech.com>

include/linux/deepin_kabi.h

@@ -443,6 +443,7 @@
 # define _DEEPIN_KABI_DEPRECATE(_type, _orig)	_type deepin_reserved_##_orig
 # define _DEEPIN_KABI_DEPRECATE_FN(_type, _orig, _args...)  \
 	_type (* deepin_reserved_##_orig)(_args)
+#ifdef CONFIG_DEEPIN_KABI_RESERVE
 # define _DEEPIN_KABI_REPLACE(_orig, _new)			  \
 	union {						  \
 		_new;					  \
@@ -451,6 +452,9 @@
 		} DEEPIN_KABI_UNIQUE_ID;			  \
 		__DEEPIN_KABI_CHECK_SIZE_ALIGN(_orig, _new);  \
 	}
+#else
+# define _DEEPIN_KABI_REPLACE(_orig, _new)		_new;
+#endif /* CONFIG_DEEPIN_KABI_RESERVE */
 
 # define _DEEPIN_KABI_EXCLUDE(_elem)		_elem
 
@@ -497,7 +501,11 @@
 
 # define DEEPIN_KABI_USE_SPLIT(n, ...)	DEEPIN_KABI_REPLACE_SPLIT(_DEEPIN_KABI_RESERVE(n), __VA_ARGS__)
 
+#ifdef CONFIG_DEEPIN_KABI_RESERVE
 # define _DEEPIN_KABI_RESERVE(n)		unsigned long deepin_reserved##n
+#else
+# define _DEEPIN_KABI_RESERVE(n)
+#endif /* CONFIG_DEEPIN_KABI_RESERVE */
 
 #define DEEPIN_KABI_EXCLUDE(_elem)		_DEEPIN_KABI_EXCLUDE(_elem);
 

init/Kconfig

@@ -1930,6 +1930,13 @@ config BINDGEN_VERSION_TEXT
 config TRACEPOINTS
 	bool
 
+config DEEPIN_KABI_RESERVE
+	bool "Support for KABI RESERVE"
+	default y
+	help
+	 This option can be turned off for images that clearly do not require
+	 kabi compatibility.
+
 source "kernel/Kconfig.kexec"
 
 endmenu		# General setup