linux-kernel - [tip:x86/alternatives 38/58] arch/x86/um/../kernel/module.c:209: undefined reference to `smp_text_poke_sync_each

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Message-ID: <202504141003.kc69fVoj-lkp@intel.com>
Date: Mon, 14 Apr 2025 10:29:13 +0800
From: kernel test robot <lkp@...el.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [tip:x86/alternatives 38/58] arch/x86/um/../kernel/module.c:209:
 undefined reference to `smp_text_poke_sync_each_cpu'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/alternatives
head:   af8967158f9ad759a93e8e7a933c10e7cbb01ba2
commit: 6e4955a9d73ebdc8496e6bff7f6d2bf83c01959f [38/58] x86/alternatives: Rename 'text_poke_sync()' to 'smp_text_poke_sync_each_cpu()'
config: um-defconfig (https://download.01.org/0day-ci/archive/20250414/202504141003.kc69fVoj-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250414/202504141003.kc69fVoj-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/202504141003.kc69fVoj-lkp@intel.com/

All errors (new ones prefixed by >>):

   /usr/bin/ld: warning: .tmp_vmlinux1 has a LOAD segment with RWX permissions
   /usr/bin/ld: arch/x86/kernel/module.o: in function `apply_relocate_add':
>> arch/x86/um/../kernel/module.c:209: undefined reference to `smp_text_poke_sync_each_cpu'
   clang: error: linker command failed with exit code 1 (use -v to see invocation)


vim +209 arch/x86/um/../kernel/module.c

   188	
   189	static int write_relocate_add(Elf64_Shdr *sechdrs,
   190				      const char *strtab,
   191				      unsigned int symindex,
   192				      unsigned int relsec,
   193				      struct module *me,
   194				      bool apply)
   195	{
   196		int ret;
   197		bool early = me->state == MODULE_STATE_UNFORMED;
   198		void *(*write)(void *, const void *, size_t) = memcpy;
   199	
   200		if (!early) {
   201			write = text_poke;
   202			mutex_lock(&text_mutex);
   203		}
   204	
   205		ret = __write_relocate_add(sechdrs, strtab, symindex, relsec, me,
   206					   write, apply);
   207	
   208		if (!early) {
 > 209			smp_text_poke_sync_each_cpu();
   210			mutex_unlock(&text_mutex);
   211		}
   212	
   213		return ret;
   214	}
   215	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki