linux-kernel - Re: WARNING: modpost: vmlinux: section mismatch in reference: set_high_memory+0x8c (section: .text.unlikely) -> zone_movable

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Message-ID: <aBm6RKy_AO5iISh1@localhost.localdomain>
Date: Tue, 6 May 2025 09:29:08 +0200
From: Oscar Salvador <osalvador@...e.de>
To: kernel test robot <lkp@...el.com>
Cc: "Mike Rapoport (Microsoft)" <rppt@...nel.org>,
	oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: WARNING: modpost: vmlinux: section mismatch in reference:
 set_high_memory+0x8c (section: .text.unlikely) -> zone_movable_pfn (section:
 .init.data)

On Tue, May 06, 2025 at 09:42:54AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   01f95500a162fca88cefab9ed64ceded5afabc12
> commit: e120d1bc12da5c1bb871c346f741296610fd6fcb arch, mm: set high_memory in free_area_init()
> date:   7 weeks ago
> config: arm-randconfig-r062-20250506 (https://download.01.org/0day-ci/archive/20250506/202505060901.Qcs06UoB-lkp@intel.com/config)
> compiler: arm-linux-gnueabi-gcc (GCC) 10.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250506/202505060901.Qcs06UoB-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202505060901.Qcs06UoB-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>, old ones prefixed by <<):
> 
> >> WARNING: modpost: vmlinux: section mismatch in reference: set_high_memory+0x8c (section: .text.unlikely) -> zone_movable_pfn (section: .init.data)

Perhaps?

 diff --git a/mm/mm_init.c b/mm/mm_init.c
 index 80a5370ac6ab..5efec0399e18 100644
 --- a/mm/mm_init.c
 +++ b/mm/mm_init.c
 @@ -1785,7 +1785,7 @@ static bool arch_has_descending_max_zone_pfns(void)
  	return IS_ENABLED(CONFIG_ARC) && !IS_ENABLED(CONFIG_ARC_HAS_PAE40);
  }
 
 -static void set_high_memory(void)
 +static void __init set_high_memory(void)
  {
  	phys_addr_t highmem = memblock_end_of_DRAM();


-- 
Oscar Salvador
SUSE Labs