Export min_low_pfn & max_low_pfn in mm/memblock.c to fix build errors on arch/microblaze/ and arch/ia64/: (e.g.)
ERROR: "max_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined! ERROR: "min_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined! ERROR: "max_low_pfn" [drivers/mtd/spi-nor/spi-nor.ko] undefined! ERROR: "min_low_pfn" [drivers/mtd/spi-nor/spi-nor.ko] undefined! ERROR: "min_low_pfn" [drivers/mtd/nand/raw/nand.ko] undefined! ERROR: "max_low_pfn" [drivers/mtd/nand/raw/nand.ko] undefined! ERROR: "max_low_pfn" [drivers/rapidio/devices/rio_mport_cdev.ko] undefined! ERROR: "min_low_pfn" [drivers/rapidio/devices/rio_mport_cdev.ko] undefined! ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: "max_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: "min_low_pfn" [drivers/crypto/cavium/nitrox/n5pf.ko] undefined! ERROR: "max_low_pfn" [drivers/crypto/cavium/nitrox/n5pf.ko] undefined! ERROR: "max_low_pfn" [drivers/md/dm-integrity.ko] undefined! ERROR: "min_low_pfn" [drivers/md/dm-integrity.ko] undefined! ERROR: "max_low_pfn" [crypto/tcrypt.ko] undefined! ERROR: "min_low_pfn" [crypto/tcrypt.ko] undefined! In both arches, these variables are referenced in arch/$ARCH/include/asm/page.h. Mike had/has an alternate patch for Microblaze: https://lore.kernel.org/lkml/20200630111519.ga1951...@linux.ibm.com/ David suggested just exporting min_low_pfn & max_low_pfn in mm/memblock.c: https://lore.kernel.org/lkml/alpine.deb.2.22.394.2006291911220.1118...@chino.kir.corp.google.com/ Reported-by: kernel test robot <l...@intel.com> Suggested-by: David Rientjes <rient...@google.com> Signed-off-by: Randy Dunlap <rdun...@infradead.org> Cc: linux...@kvack.org Cc: Andrew Morton <a...@linux-foundation.org> Cc: David Rientjes <rient...@google.com> Cc: Mike Rapoport <r...@linux.ibm.com> Cc: Michal Simek <mon...@monstr.eu> Cc: Michal Simek <michal.si...@xilinx.com> Cc: Tony Luck <tony.l...@intel.com> Cc: Fenghua Yu <fenghua...@intel.com> Cc: linux-i...@vger.kernel.org --- mm/memblock.c | 2 ++ 1 file changed, 2 insertions(+) --- linux-next-20200825.orig/mm/memblock.c +++ linux-next-20200825/mm/memblock.c @@ -99,6 +99,8 @@ EXPORT_SYMBOL(contig_page_data); unsigned long max_low_pfn; unsigned long min_low_pfn; +EXPORT_SYMBOL(min_low_pfn); +EXPORT_SYMBOL(max_low_pfn); unsigned long max_pfn; unsigned long long max_possible_pfn;
