Commit 35561bab authored Sep 17, 2025 by Menglong Dong Committed by Peter Zijlstra Sep 25, 2025

arch: Add the macro COMPILE_OFFSETS to all the asm-offsets.c



The include/generated/asm-offsets.h is generated in Kbuild during
compiling from arch/SRCARCH/kernel/asm-offsets.c. When we want to
generate another similar offset header file, circular dependency can
happen.

For example, we want to generate a offset file include/generated/test.h,
which is included in include/sched/sched.h. If we generate asm-offsets.h
first, it will fail, as include/sched/sched.h is included in asm-offsets.c
and include/generated/test.h doesn't exist; If we generate test.h first,
it can't success neither, as include/generated/asm-offsets.h is included
by it.

In x86_64, the macro COMPILE_OFFSETS is used to avoid such circular
dependency. We can generate asm-offsets.h first, and if the
COMPILE_OFFSETS is defined, we don't include the "generated/test.h".

And we define the macro COMPILE_OFFSETS for all the asm-offsets.c for this
purpose.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

parent 0d4eaf8c

arch/alpha/kernel/asm-offsets.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -4,6 +4,7 @@
		* This code generates raw asm output which is post-processed to extract
		* and format the required data.
		*/
		#define COMPILE_OFFSETS

		#include <linux/types.h>
		#include <linux/stddef.h>

arch/arc/kernel/asm-offsets.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2,6 +2,7 @@
		/*
		* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
		*/
		#define COMPILE_OFFSETS

		#include <linux/sched.h>
		#include <linux/mm.h>

arch/arm/kernel/asm-offsets.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,8 @@
		* This code generates raw asm output which is post-processed to extract
		* and format the required data.
		*/
		#define COMPILE_OFFSETS

		#include <linux/compiler.h>
		#include <linux/sched.h>
		#include <linux/mm.h>

arch/arm64/kernel/asm-offsets.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@
		* 2001-2002 Keith Owens
		* Copyright (C) 2012 ARM Ltd.
		*/
		#define COMPILE_OFFSETS

		#include <linux/arm_sdei.h>
		#include <linux/sched.h>

arch/csky/kernel/asm-offsets.c

+1 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
		#define COMPILE_OFFSETS

		#include <linux/sched.h>
		#include <linux/kernel_stat.h>