ld.lld: error: undefined symbol: rust_helper_pci_alloc_irq_vectors

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2961f841b025fb234860bac26dfb7fa7cb0fb122
commit: d9ea5a41cef80dc8103f4114b072b27364f2e06a rust: sync: Add memory barriers
date:   5 months ago
config: x86_64-randconfig-005-20260217 (https://download.01.org/0day-ci/archive/20260218/202602181005.ri4E7Uj9-lkp@xxxxxxxxx/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260218/202602181005.ri4E7Uj9-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
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602181005.ri4E7Uj9-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: rust_helper_pci_alloc_irq_vectors
   >>> referenced by .vmlinux.export.c
   >>>               .vmlinux.export.o:(___ksymtab_gpl+rust_helper_pci_alloc_irq_vectors+0x0)
--
>> ld.lld: error: undefined symbol: rust_helper_pci_free_irq_vectors
   >>> referenced by .vmlinux.export.c
   >>>               .vmlinux.export.o:(___ksymtab_gpl+rust_helper_pci_free_irq_vectors+0x0)
--
>> ld.lld: error: undefined symbol: rust_helper_pci_irq_vector
   >>> referenced by .vmlinux.export.c
   >>>               .vmlinux.export.o:(___ksymtab_gpl+rust_helper_pci_irq_vector+0x0)

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