linux-kernel - Re: WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

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Message-ID: <20250328005542.q7oumy7v2bvpuyyd@master>
Date: Fri, 28 Mar 2025 00:55:42 +0000
From: Wei Yang <richard.weiyang@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Wei Yang <richard.weiyang@...il.com>, kernel test robot <lkp@...el.com>,
	Masahiro Yamada <masahiroy@...nel.org>,
	oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: WARNING: modpost: vmlinux: section mismatch in reference:
 mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section:
 .init.data)

On Thu, Mar 27, 2025 at 12:36:24PM -0700, Andrew Morton wrote:
>On Thu, 27 Mar 2025 01:13:12 +0000 Wei Yang <richard.weiyang@...il.com> wrote:
>
>> Since it is only used by mmu_init() which is annotated by __init, I think the
>> proper way is to add __init to mm_cmdline_setup.
>> 
>> 
>> diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
>> index 4520c5741579..e98cfaf1c62b 100644
>> --- a/arch/microblaze/mm/init.c
>> +++ b/arch/microblaze/mm/init.c
>> @@ -143,7 +143,7 @@ int page_is_ram(unsigned long pfn)
>>  /*
>>   * Check for command-line options that affect what MMU_init will do.
>>   */
>> -static void mm_cmdline_setup(void)
>> +static void __init mm_cmdline_setup(void)
>>  {
>>  	unsigned long maxmem = 0;
>>  	char *p = cmd_line;
>
>That's a correct change anyway.  Please send along a patch sometime?

Sure.

-- 
Wei Yang
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