linux-kernel - [PATCH v3 1/1] x86: Rename __{start,end}_init_task to __{start,end}_init

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Message-ID: <20240322081616.3346181-1-xin@zytor.com>
Date: Fri, 22 Mar 2024 01:16:16 -0700
From: "Xin Li (Intel)" <xin@...or.com>
To: linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-arch@...r.kernel.org
Cc: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        jgross@...e.com, boris.ostrovsky@...cle.com, arnd@...db.de
Subject: [PATCH v3 1/1] x86: Rename __{start,end}_init_task to __{start,end}_init_stack

The stack of a task has been separated from the memory of a task_struct
struture for a long time on x86, as a result __{start,end}_init_task no
longer mark the start and end of the init_task structure, but its stack
only.

Rename __{start,end}_init_task to __{start,end}_init_stack.

Note other architectures are not affected because __{start,end}_init_task
are used on x86 only.

Reviewed-by: Juergen Gross <jgross@...e.com>
Signed-off-by: Xin Li (Intel) <xin@...or.com>
---

Change since v2:
* Rebase to the latest tip master branch.

Change since v1:
* Revert an accident insane change, init_task to init_stack (Jürgen Groß).
---
 arch/x86/kernel/vmlinux.lds.S     | 2 +-
 include/asm-generic/vmlinux.lds.h | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index d430880175f2..3509afc6a672 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -168,7 +168,7 @@ SECTIONS
 		INIT_TASK_DATA(THREAD_SIZE)
 
 		/* equivalent to task_pt_regs(&init_task) */
-		__top_init_kernel_stack = __end_init_task - TOP_OF_KERNEL_STACK_PADDING - PTREGS_SIZE;
+		__top_init_kernel_stack = __end_init_stack - TOP_OF_KERNEL_STACK_PADDING - PTREGS_SIZE;
 
 #ifdef CONFIG_X86_32
 		/* 32 bit has nosave before _edata */
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index cb46306d8305..9752eb420ffa 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -399,13 +399,13 @@
 
 #define INIT_TASK_DATA(align)						\
 	. = ALIGN(align);						\
-	__start_init_task = .;						\
+	__start_init_stack = .;						\
 	init_thread_union = .;						\
 	init_stack = .;							\
 	KEEP(*(.data..init_task))					\
 	KEEP(*(.data..init_thread_info))				\
-	. = __start_init_task + THREAD_SIZE;				\
-	__end_init_task = .;
+	. = __start_init_stack + THREAD_SIZE;				\
+	__end_init_stack = .;
 
 #define JUMP_TABLE_DATA							\
 	. = ALIGN(8);							\

base-commit: 93387dba36cc9033724d8b874a5cf6779ef084ab
-- 
2.44.0