linux-next: build failure after merge of the rcu tree

Stephen Rothwell
2023-07-27T04:19:40Z

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Hi all,

After merging the rcu tree, today's linux-next build (arm64 defconfig)
failed like this:

In file included from arch/arm64/include/asm/alternative.h:9,
from arch/arm64/include/asm/lse.h:14,
from arch/arm64/include/asm/cmpxchg.h:14,
from arch/arm64/include/asm/atomic.h:16,
from include/linux/atomic.h:7,
from include/asm-generic/bitops/atomic.h:5,
from arch/arm64/include/asm/bitops.h:25,
from include/linux/bitops.h:68,
from arch/arm64/include/asm/cache.h:40,
from include/linux/cache.h:6,
from include/linux/slab.h:15,
from include/linux/resource_ext.h:11,
from include/linux/acpi.h:13,
from include/acpi/apei.h:9,
from include/acpi/ghes.h:5,
from include/linux/arm_sdei.h:8,
from arch/arm64/kernel/asm-offsets.c:10:
include/linux/init.h:149:33: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__ro_after_init'
149 | extern char boot_command_line[] __ro_after_init;
| ^~~~~~~~~~~~~~~

Caused by commit

de2f542cfbec ("fs/proc: Add /proc/cmdline_load for boot loader arguments")

I have applied the following fix up (I have a faint memory that the
section setting attributes are only needed on the definition, not the
declaration):

From 9f56e539ed7d9c402caa85d4f5f3f8cec8373b2f Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Thu, 27 Jul 2023 13:26:08 +1000
Subject: [PATCH] fix up for "fs/proc: Add /proc/cmdline_load for boot loader
arguments"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
include/linux/init.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/include/linux/init.h b/include/linux/init.h
index e3ce68988e1b..c075983c5015 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -113,8 +113,6 @@

#ifndef __ASSEMBLY__

-#include <linux/cache.h>
-
/*
* Used for initialization calls..
*/
@@ -146,7 +144,7 @@ struct file_system_type;

/* Defined in init/main.c */
extern int do_one_initcall(initcall_t fn);
-extern char boot_command_line[] __ro_after_init;
+extern char boot_command_line[];
extern char *saved_command_line;
extern unsigned int saved_command_line_len;
extern unsigned int reset_devices;
--
2.40.1

--
Cheers,
Stephen Rothwell

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