Subject: [RFC PATCH 1/8] arm64: add CPU field to struct thread_info

From: Ard Biesheuvel <[email-masked]>
Date: Tue, 14 Sep 2021 14:10:29 +0200

The CPU field will be moved back into thread_info even when
THREAD_INFO_IN_TASK is enabled, so add it back to arm64's definition of
struct thread_info.

Signed-off-by: Ard Biesheuvel <[email-masked]>
---
 arch/arm64/include/asm/thread_info.h | 1 +
 arch/arm64/kernel/asm-offsets.c      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index 6623c99f0984..c02bc8c183c3 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -42,6 +42,7 @@ struct thread_info {
 	void			*scs_base;
 	void			*scs_sp;
 #endif
+	u32			cpu;
 };
 
 #define thread_saved_pc(tsk)	\
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index 551427ae8cc5..cee9f3e9f906 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -29,6 +29,7 @@ int main(void)
   DEFINE(TSK_ACTIVE_MM,		offsetof(struct task_struct, active_mm));
   DEFINE(TSK_CPU,		offsetof(struct task_struct, cpu));
   BLANK();
+  DEFINE(TSK_TI_CPU,		offsetof(struct task_struct, thread_info.cpu));
   DEFINE(TSK_TI_FLAGS,		offsetof(struct task_struct, thread_info.flags));
   DEFINE(TSK_TI_PREEMPT,	offsetof(struct task_struct, thread_info.preempt_count));
 #ifdef CONFIG_ARM64_SW_TTBR0_PAN
-- 
2.30.2