linux-kernel - ld.lld: error: undefined symbol: riscv_noncoherent_register_cache

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Message-ID: <202512300659.54hsZftH-lkp@intel.com>
Date: Tue, 30 Dec 2025 07:01:24 +0800
From: kernel test robot <lkp@...el.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Conor Dooley <conor.dooley@...rochip.com>
Subject: ld.lld: error: undefined symbol:
 riscv_noncoherent_register_cache_ops

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8640b74557fc8b4c300030f6ccb8cd078f665ec8
commit: 4d1608d0ab3365d1ef9447bdbc0cb4c0962f1774 cache: Make top level Kconfig menu a boolean dependent on RISCV
date:   5 weeks ago
config: riscv-randconfig-r064-20251230 (https://download.01.org/0day-ci/archive/20251230/202512300659.54hsZftH-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251230/202512300659.54hsZftH-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/202512300659.54hsZftH-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: riscv_noncoherent_register_cache_ops
   >>> referenced by ax45mp_cache.c
   >>>               drivers/cache/ax45mp_cache.o:(ax45mp_cache_init) in archive vmlinux.a

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for AX45MP_L2_CACHE
   Depends on [n]: CACHEMAINT_FOR_DMA [=n]
   Selected by [y]:
   - ARCH_R9A07G043 [=y] && SOC_RENESAS [=y] && RISCV [=y] && NONPORTABLE [=y] && !DMA_DIRECT_REMAP [=n] && RISCV_ALTERNATIVE [=y] && !RISCV_ISA_ZICBOM [=n] && RISCV_SBI [=y]

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