arch/riscv/kernel/alternative.c:198:6: error: use of undeclared identifier '__vdso_alternatives_start_offset'; did you mean '__vdso_alternatives_start_cfi_offset'?

From: kernel test robot

Date: Tue Oct 13 2026 - 15:46:37 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907
commit: 63aecaba41a4b2593697f208e91bf542248ec4f8 riscv: alternative: Use the statically extracted vDSO section offsets
date: 10 weeks ago
config: riscv-randconfig-r2104-20261013 (https://download.01.org/0day-ci/archive/20261013/202610131613.BpOi6VPp-lkp@xxxxxxxxx/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project ce2a4984a3f43327a2b7c40baa74907bc10eb899)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261013/202610131613.BpOi6VPp-lkp@xxxxxxxxx/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
| Fixes: 63aecaba41a4 ("riscv: alternative: Use the statically extracted vDSO section offsets")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610131613.BpOi6VPp-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> arch/riscv/kernel/alternative.c:198:6: error: use of undeclared identifier '__vdso_alternatives_start_offset'; did you mean '__vdso_alternatives_start_cfi_offset'?
198 | __vdso_alternatives_start_offset,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| __vdso_alternatives_start_cfi_offset
arch/riscv/include/asm/vdso.h:29:15: note: '__vdso_alternatives_start_cfi_offset' declared here
29 | extern size_t __vdso_alternatives_start_cfi_offset, __vdso_alternatives_end_cfi_offset;
| ^
>> arch/riscv/kernel/alternative.c:199:6: error: use of undeclared identifier '__vdso_alternatives_end_offset'; did you mean '__vdso_alternatives_end_cfi_offset'?
199 | __vdso_alternatives_end_offset);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| __vdso_alternatives_end_cfi_offset
arch/riscv/include/asm/vdso.h:29:53: note: '__vdso_alternatives_end_cfi_offset' declared here
29 | extern size_t __vdso_alternatives_start_cfi_offset, __vdso_alternatives_end_cfi_offset;
| ^
2 errors generated.


vim +198 arch/riscv/kernel/alternative.c

186
187 void __init apply_boot_alternatives(void)
188 {
189 /* If called on non-boot cpu things could go wrong */
190 WARN_ON(smp_processor_id() != 0);
191
192 _apply_alternatives((struct alt_entry *)__alt_start,
193 (struct alt_entry *)__alt_end,
194 RISCV_ALTERNATIVES_BOOT);
195
196 if (IS_ENABLED(CONFIG_MMU))
197 apply_vdso_alternatives(vdso_start,
> 198 __vdso_alternatives_start_offset,
> 199 __vdso_alternatives_end_offset);
200
201 if (IS_ENABLED(CONFIG_RISCV_USER_CFI))
202 apply_vdso_alternatives(vdso_cfi_start,
203 __vdso_alternatives_start_cfi_offset,
204 __vdso_alternatives_end_cfi_offset);
205 }
206

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