[thomas-weissschuh:b4/vdso-asm-generic-vsyscall-h 12/12] arch/riscv/kernel/sys_hwprobe.c:525:31: error: use of undeclared identifier 'vdso_k_arch_data'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/vdso-asm-generic-vsyscall-h
head:   adcfde532be640a97064a7f9ecb20b6026a4c3d2
commit: adcfde532be640a97064a7f9ecb20b6026a4c3d2 [12/12] remove
config: riscv-randconfig-001-20260813 (https://download.01.org/0day-ci/archive/20260813/[email protected]/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 6ea395e4fe4db26920d57779ddae98eac6ba945d)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260813/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> arch/riscv/kernel/sys_hwprobe.c:525:31: error: use of undeclared identifier 'vdso_k_arch_data'
     525 |         struct vdso_arch_data *avd = vdso_k_arch_data;
         |                                      ^~~~~~~~~~~~~~~~
>> arch/riscv/kernel/sys_hwprobe.c:543:6: error: incomplete definition of type 'struct vdso_arch_data'
     543 |                 avd->all_cpu_hwprobe_values[key] = pair.value;
         |                 ~~~^
   arch/riscv/kernel/sys_hwprobe.c:525:9: note: forward declaration of 'struct vdso_arch_data'
     525 |         struct vdso_arch_data *avd = vdso_k_arch_data;
         |                ^
   arch/riscv/kernel/sys_hwprobe.c:559:5: error: incomplete definition of type 'struct vdso_arch_data'
     559 |         avd->homogeneous_cpus = id_bitsmash != 0 && id_bitsmash != -1;
         |         ~~~^
   arch/riscv/kernel/sys_hwprobe.c:525:9: note: forward declaration of 'struct vdso_arch_data'
     525 |         struct vdso_arch_data *avd = vdso_k_arch_data;
         |                ^
   arch/riscv/kernel/sys_hwprobe.c:567:5: error: incomplete definition of type 'struct vdso_arch_data'
     567 |         avd->ready = true;
         |         ~~~^
   arch/riscv/kernel/sys_hwprobe.c:525:9: note: forward declaration of 'struct vdso_arch_data'
     525 |         struct vdso_arch_data *avd = vdso_k_arch_data;
         |                ^
   arch/riscv/kernel/sys_hwprobe.c:573:31: error: use of undeclared identifier 'vdso_k_arch_data'
     573 |         struct vdso_arch_data *avd = vdso_k_arch_data;
         |                                      ^~~~~~~~~~~~~~~~
   arch/riscv/kernel/sys_hwprobe.c:579:5: error: incomplete definition of type 'struct vdso_arch_data'
     579 |         avd->ready = false;
         |         ~~~^
   arch/riscv/kernel/sys_hwprobe.c:573:9: note: forward declaration of 'struct vdso_arch_data'
     573 |         struct vdso_arch_data *avd = vdso_k_arch_data;
         |                ^
   6 errors generated.


vim +/vdso_k_arch_data +525 arch/riscv/kernel/sys_hwprobe.c

53b2b22850e1ff Andrew Jones     2023-11-22  522  
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  523  static int complete_hwprobe_vdso_data(void)
53b2b22850e1ff Andrew Jones     2023-11-22  524  {
46fe55b204bfb0 Thomas Weißschuh 2025-02-04 @525  	struct vdso_arch_data *avd = vdso_k_arch_data;
53b2b22850e1ff Andrew Jones     2023-11-22  526  	u64 id_bitsmash = 0;
53b2b22850e1ff Andrew Jones     2023-11-22  527  	struct riscv_hwprobe pair;
53b2b22850e1ff Andrew Jones     2023-11-22  528  	int key;
53b2b22850e1ff Andrew Jones     2023-11-22  529  
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  530  	if (unlikely(!atomic_dec_and_test(&pending_boot_probes)))
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  531  		wait_for_completion(&boot_probes_done);
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  532  
53b2b22850e1ff Andrew Jones     2023-11-22  533  	/*
53b2b22850e1ff Andrew Jones     2023-11-22  534  	 * Initialize vDSO data with the answers for the "all CPUs" case, to
53b2b22850e1ff Andrew Jones     2023-11-22  535  	 * save a syscall in the common case.
53b2b22850e1ff Andrew Jones     2023-11-22  536  	 */
53b2b22850e1ff Andrew Jones     2023-11-22  537  	for (key = 0; key <= RISCV_HWPROBE_MAX_KEY; key++) {
53b2b22850e1ff Andrew Jones     2023-11-22  538  		pair.key = key;
53b2b22850e1ff Andrew Jones     2023-11-22  539  		hwprobe_one_pair(&pair, cpu_online_mask);
53b2b22850e1ff Andrew Jones     2023-11-22  540  
53b2b22850e1ff Andrew Jones     2023-11-22  541  		WARN_ON_ONCE(pair.key < 0);
53b2b22850e1ff Andrew Jones     2023-11-22  542  
53b2b22850e1ff Andrew Jones     2023-11-22 @543  		avd->all_cpu_hwprobe_values[key] = pair.value;
53b2b22850e1ff Andrew Jones     2023-11-22  544  		/*
53b2b22850e1ff Andrew Jones     2023-11-22  545  		 * Smash together the vendor, arch, and impl IDs to see if
53b2b22850e1ff Andrew Jones     2023-11-22  546  		 * they're all 0 or any negative.
53b2b22850e1ff Andrew Jones     2023-11-22  547  		 */
53b2b22850e1ff Andrew Jones     2023-11-22  548  		if (key <= RISCV_HWPROBE_KEY_MIMPID)
53b2b22850e1ff Andrew Jones     2023-11-22  549  			id_bitsmash |= pair.value;
53b2b22850e1ff Andrew Jones     2023-11-22  550  	}
53b2b22850e1ff Andrew Jones     2023-11-22  551  
53b2b22850e1ff Andrew Jones     2023-11-22  552  	/*
53b2b22850e1ff Andrew Jones     2023-11-22  553  	 * If the arch, vendor, and implementation ID are all the same across
53b2b22850e1ff Andrew Jones     2023-11-22  554  	 * all harts, then assume all CPUs are the same, and allow the vDSO to
53b2b22850e1ff Andrew Jones     2023-11-22  555  	 * answer queries for arbitrary masks. However if all values are 0 (not
53b2b22850e1ff Andrew Jones     2023-11-22  556  	 * populated) or any value returns -1 (varies across CPUs), then the
53b2b22850e1ff Andrew Jones     2023-11-22  557  	 * vDSO should defer to the kernel for exotic cpu masks.
53b2b22850e1ff Andrew Jones     2023-11-22  558  	 */
53b2b22850e1ff Andrew Jones     2023-11-22  559  	avd->homogeneous_cpus = id_bitsmash != 0 && id_bitsmash != -1;
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  560  
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  561  	/*
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  562  	 * Make sure all the VDSO values are visible before we look at them.
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  563  	 * This pairs with the implicit "no speculativly visible accesses"
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  564  	 * barrier in the VDSO hwprobe code.
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  565  	 */
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  566  	smp_wmb();
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  567  	avd->ready = true;
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  568  	return 0;
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  569  }
5d15d2ad36b0f7 Jingwei Wang     2025-08-11  570  

:::::: The code at line 525 was first introduced by commit
:::::: 46fe55b204bfb007e0f0a5409dcda063ad98b089 riscv: vdso: Switch to generic storage implementation

:::::: TO: Thomas Weißschuh <[email protected]>
:::::: CC: Thomas Gleixner <[email protected]>

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