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Wed, 26 Mar 2025 18:13:13 -0700 (PDT) Date: Thu, 27 Mar 2025 01:13:12 +0000 From: Wei Yang To: kernel test robot Cc: Masahiro Yamada , oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List , Wei Yang Subject: Re: WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data) Message-ID: <20250327011312.mj55byrfatiprddh@master> Reply-To: Wei Yang References: <202503241259.kJV3U7Xj-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202503241259.kJV3U7Xj-lkp@intel.com> User-Agent: NeoMutt/20170113 (1.7.2) On Mon, Mar 24, 2025 at 12:59:00PM +0800, kernel test robot wrote: >tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >head: 586de92313fcab8ed84ac5f78f4d2aae2db92c59 >commit: 73db3abdca58c8a014ec4c88cf5ef925cbf63669 init/modpost: conditionally check section mismatch to __meminit* Looks this is not the cause, after reverting this commit it still report mismatch. >date: 8 months ago >config: microblaze-randconfig-r061-20250323 (https://download.01.org/0day-ci/archive/20250324/202503241259.kJV3U7Xj-lkp@intel.com/config) >compiler: microblaze-linux-gcc (GCC) 10.5.0 >reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250324/202503241259.kJV3U7Xj-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 >| Closes: https://lore.kernel.org/oe-kbuild-all/202503241259.kJV3U7Xj-lkp@intel.com/ > >All warnings (new ones prefixed by >>, old ones prefixed by <<): > >>> WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data) The reason for this is gcc put mm_cmdline_setup into .text.unlikely section. 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; -- Wei Yang Help you, Help me