On Tue, 30 Jun 2020, kernel test robot wrote: > Hi Alexander, > > FYI, the error/warning still remains. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: 7c30b859a947535f2213277e827d7ac7dcff9c84 > commit: f220df66f67684246ae1bf4a4e479efc7c2f325a intel_th: msu-sink: An > example msu buffer "sink" > date: 11 months ago > config: microblaze-randconfig-c023-20200629 (attached as .config) > compiler: microblaze-linux-gcc (GCC) 9.3.0 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <l...@intel.com> > > All errors (new ones prefixed by >>): > > ERROR: "min_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined! > >> ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu_sink.ko] > >> undefined! > ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] > undefined! > ERROR: "min_low_pfn" [drivers/mmc/core/mmc_core.ko] undefined! > ERROR: "min_low_pfn" [drivers/md/dm-crypt.ko] undefined! > ERROR: "min_low_pfn" [drivers/net/wireless/ath/ath6kl/ath6kl_sdio.ko] > undefined! > ERROR: "min_low_pfn" [crypto/tcrypt.ko] undefined! > ERROR: "min_low_pfn" [crypto/asymmetric_keys/asym_tpm.ko] undefined! >
Looks like we have precedence for min_low_pfn failures and we can't blame this poor commit :) I wonder why we don't simply do EXPORT_SYMBOL() in mm/memblock.c, non-microblaze architectures do this themselves because it doesn't get generically exported: arch/ia64/kernel/ia64_ksyms.c:EXPORT_SYMBOL(min_low_pfn); /* defined by bootmem.c, but not exported by generic code */ arch/sh/kernel/sh_ksyms_32.c:EXPORT_SYMBOL(min_low_pfn); Adding Mike Rapoport.
