linux-kernel - Re: {standard input}:2277: Error: pcrel offset for branch to .LS000B too far (0x3c)

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Date:   Mon, 28 Feb 2022 10:20:22 +0800
From:   Feng Tang <feng.tang@...el.com>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: {standard input}:2277: Error: pcrel offset for branch to .LS000B
 too far (0x3c)

On Sun, Feb 27, 2022 at 04:29:30PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   2293be58d6a18cab800e25e42081bacb75c05752
> commit: cf536e185869d4815d506e777bcca6edd9966a6e Makefile: extend 32B aligned debug option to 64B aligned
> date:   9 months ago
> config: csky-randconfig-r003-20220227 (https://download.01.org/0day-ci/archive/20220227/202202271612.W32UJAj2-lkp@intel.com/config)
> compiler: csky-linux-gcc (GCC) 11.2.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cf536e185869d4815d506e777bcca6edd9966a6e
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout cf536e185869d4815d506e777bcca6edd9966a6e
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=csky SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    {standard input}: Assembler messages:
> >> {standard input}:2277: Error: pcrel offset for branch to .LS000B too far (0x3c)

Thanks for the report! can you try this following fix? 

Thanks,
Feng

---

>From c386ee06e5dbc89b69a0a58edace3f54fd5e2b8f Mon Sep 17 00:00:00 2001
From: Feng Tang <feng.tang@...el.com>
Date: Mon, 28 Feb 2022 09:44:04 +0800
Subject: [PATCH] lib/Kconfig.debug: add ARCH dependency for FUNCTION_ALIGNMENT
 option

0Day robots reported there is compiling issue for 'csky' ARCH
when CONFIG_DEBUG_FORCE_DATA_SECTION_ALIGNED is enabled:

"
All errors (new ones prefixed by >>):

   {standard input}: Assembler messages:
>> {standard input}:2277: Error: pcrel offset for branch to .LS000B too far (0x3c)
"

Which has been discussed in [1]. And as there is no solution for csky
yet, add some dependency for this config to limit it to several ARCHs
which have no compiling issue so far.

[1]. https://www.spinics.net/lists/linux-kbuild/msg30298.html

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Feng Tang <feng.tang@...el.com>
---
 lib/Kconfig.debug | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 14b89aa37c5c..39298958ad3a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -417,6 +417,7 @@ config SECTION_MISMATCH_WARN_ONLY
 
 config DEBUG_FORCE_FUNCTION_ALIGN_64B
 	bool "Force all function address 64B aligned" if EXPERT
+	depends on PPC || ARM || X86
 	help
 	  There are cases that a commit from one domain changes the function
 	  address alignment of other domains, and cause magic performance
-- 
2.27.0