[linux-next:master 3551/8679] arch/riscv/kernel/compat_signal.c:220:28: error: use of undeclared identifier 'compat__vdso_rt_sigreturn_offset'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   0a00723f4c2d0b273edd0737f236f103164a08eb
commit: 89079520cef65d6da1e864eab4464effe5396e23 [3551/8679] RISC-V: vDSO: Wire up getrandom() vDSO implementation
config: riscv-defconfig (https://download.01.org/0day-ci/archive/20250507/202505071542.jdBqsSPB-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/20250507/202505071542.jdBqsSPB-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505071542.jdBqsSPB-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/riscv/kernel/compat_signal.c:220:28: error: use of undeclared identifier 'compat__vdso_rt_sigreturn_offset'
     220 |         regs->ra = (unsigned long)COMPAT_VDSO_SYMBOL(
         |                                   ^
   arch/riscv/include/asm/vdso.h:29:42: note: expanded from macro 'COMPAT_VDSO_SYMBOL'
      29 |         (void __user *)((unsigned long)(base) + compat__vdso_##name##_offset)
         |                                                 ^
   <scratch space>:315:1: note: expanded from here
     315 | compat__vdso_rt_sigreturn_offset
         | ^
   1 error generated.


vim +/compat__vdso_rt_sigreturn_offset +220 arch/riscv/kernel/compat_signal.c

7383ee05314be58 Guo Ren 2022-04-05  198  
7383ee05314be58 Guo Ren 2022-04-05  199  int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set,
7383ee05314be58 Guo Ren 2022-04-05  200  	struct pt_regs *regs)
7383ee05314be58 Guo Ren 2022-04-05  201  {
7383ee05314be58 Guo Ren 2022-04-05  202  	struct compat_rt_sigframe __user *frame;
7383ee05314be58 Guo Ren 2022-04-05  203  	long err = 0;
7383ee05314be58 Guo Ren 2022-04-05  204  
7383ee05314be58 Guo Ren 2022-04-05  205  	frame = compat_get_sigframe(ksig, regs, sizeof(*frame));
7383ee05314be58 Guo Ren 2022-04-05  206  	if (!access_ok(frame, sizeof(*frame)))
7383ee05314be58 Guo Ren 2022-04-05  207  		return -EFAULT;
7383ee05314be58 Guo Ren 2022-04-05  208  
7383ee05314be58 Guo Ren 2022-04-05  209  	err |= copy_siginfo_to_user32(&frame->info, &ksig->info);
7383ee05314be58 Guo Ren 2022-04-05  210  
7383ee05314be58 Guo Ren 2022-04-05  211  	/* Create the ucontext. */
7383ee05314be58 Guo Ren 2022-04-05  212  	err |= __put_user(0, &frame->uc.uc_flags);
7383ee05314be58 Guo Ren 2022-04-05  213  	err |= __put_user(NULL, &frame->uc.uc_link);
7383ee05314be58 Guo Ren 2022-04-05  214  	err |= __compat_save_altstack(&frame->uc.uc_stack, regs->sp);
7383ee05314be58 Guo Ren 2022-04-05  215  	err |= compat_setup_sigcontext(frame, regs);
7383ee05314be58 Guo Ren 2022-04-05  216  	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
7383ee05314be58 Guo Ren 2022-04-05  217  	if (err)
7383ee05314be58 Guo Ren 2022-04-05  218  		return -EFAULT;
7383ee05314be58 Guo Ren 2022-04-05  219  
7383ee05314be58 Guo Ren 2022-04-05 @220  	regs->ra = (unsigned long)COMPAT_VDSO_SYMBOL(
7383ee05314be58 Guo Ren 2022-04-05  221  			current->mm->context.vdso, rt_sigreturn);
7383ee05314be58 Guo Ren 2022-04-05  222  
7383ee05314be58 Guo Ren 2022-04-05  223  	/*
7383ee05314be58 Guo Ren 2022-04-05  224  	 * Set up registers for signal handler.
7383ee05314be58 Guo Ren 2022-04-05  225  	 * Registers that we don't modify keep the value they had from
7383ee05314be58 Guo Ren 2022-04-05  226  	 * user-space at the time we took the signal.
7383ee05314be58 Guo Ren 2022-04-05  227  	 * We always pass siginfo and mcontext, regardless of SA_SIGINFO,
7383ee05314be58 Guo Ren 2022-04-05  228  	 * since some things rely on this (e.g. glibc's debug/segfault.c).
7383ee05314be58 Guo Ren 2022-04-05  229  	 */
7383ee05314be58 Guo Ren 2022-04-05  230  	regs->epc = (unsigned long)ksig->ka.sa.sa_handler;
7383ee05314be58 Guo Ren 2022-04-05  231  	regs->sp = (unsigned long)frame;
7383ee05314be58 Guo Ren 2022-04-05  232  	regs->a0 = ksig->sig;                     /* a0: signal number */
7383ee05314be58 Guo Ren 2022-04-05  233  	regs->a1 = (unsigned long)(&frame->info); /* a1: siginfo pointer */
7383ee05314be58 Guo Ren 2022-04-05  234  	regs->a2 = (unsigned long)(&frame->uc);   /* a2: ucontext pointer */
7383ee05314be58 Guo Ren 2022-04-05  235  

:::::: The code at line 220 was first introduced by commit
:::::: 7383ee05314be58f8f9f018ee0ac53bef3808aea riscv: compat: signal: Add rt_frame implementation

:::::: TO: Guo Ren <guoren@linux.alibaba.com>
:::::: CC: Palmer Dabbelt <palmer@rivosinc.com>

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