KABI: add reserve space for thread_info struct

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4KAP1?from=project-issue
CVE: NA

-------------------------------

We reserve some fields beforehand for thread_info prone to change.
Signed-off-by: NGuan Jing <guanjing6@huawei.com>
Reviewed-by: NChen Hui <judy.chenhui@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm/include/asm/thread_info.h

@@ -12,6 +12,7 @@
 #include <linux/compiler.h>
 #include <asm/fpstate.h>
 #include <asm/page.h>
+#include <linux/kabi.h>
 
 #ifdef CONFIG_KASAN
 /*
@@ -73,6 +74,8 @@ struct thread_info {
 #ifdef CONFIG_ARM_THUMBEE
 	unsigned long		thumbee_state;	/* ThumbEE Handler Base register */
 #endif
+	KABI_RESERVE(1)
+	KABI_RESERVE(2)
 };
 
 #define INIT_THREAD_INFO(tsk)						\

arch/arm64/include/asm/thread_info.h

@@ -17,6 +17,7 @@ struct task_struct;
 #include <asm/memory.h>
 #include <asm/stack_pointer.h>
 #include <asm/types.h>
+#include <linux/kabi.h>
 
 typedef unsigned long mm_segment_t;
 
@@ -46,6 +47,9 @@ struct thread_info {
 	void			*scs_sp;
 #endif
 	u32			cpu;
+
+	KABI_RESERVE(1)
+	KABI_RESERVE(2)
 };
 
 #define thread_saved_pc(tsk)	\

arch/x86/include/asm/thread_info.h

@@ -12,6 +12,7 @@
 #include <asm/page.h>
 #include <asm/percpu.h>
 #include <asm/types.h>
+#include <linux/kabi.h>
 
 /*
  * TOP_OF_KERNEL_STACK_PADDING is a number of unused bytes that we
@@ -59,6 +60,8 @@ struct thread_info {
 #ifdef CONFIG_SMP
 	u32			cpu;		/* current CPU */
 #endif
+	KABI_RESERVE(1)
+	KABI_RESERVE(2)
 };
 
 #define INIT_THREAD_INFO(tsk)			\