On ARCH=s390: By disabling CONFIG_PCI and hence also disabling CONFIG_HAS_IOMEM (after having done 'make ARCH=s390 allmodconfig'), we can see all of the drivers that use IOMEM-related interfaces without mentioning that they do so (in their respective Kconfig files). This should catch all of them, instead of various randconfig builds catching a few of them at a time. (I'm not trying to pick on arch/s390/ here -- more on the piecemeal randconfig approach of some 'bot'. :) I have grouped them by subsystem (more or less). (This was done on linux-next of 2021-03-15.) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ make[1]: Entering directory 'linux-next-20210315/S390' kernel/dma: gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory': coherent.c:(.text+0x39c): undefined reference to `memremap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: coherent.c:(.text+0x4e0): undefined reference to `memunmap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory': coherent.c:(.text+0xac6): undefined reference to `memunmap' irqchip: gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: drivers/irqchip/irq-al-fic.o: in function `al_fic_init_dt': irq-al-fic.c:(.init.text+0x6c): undefined reference to `of_iomap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: irq-al-fic.c:(.init.text+0x49c): undefined reference to `iounmap' clk / clocksource: gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: drivers/clk/clk-fixed-mmio.o: in function `fixed_mmio_clk_setup': clk-fixed-mmio.c:(.text+0x9a): undefined reference to `of_iomap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: clk-fixed-mmio.c:(.text+0xe6): undefined reference to `iounmap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_init': timer-of.c:(.init.text+0x8e): undefined reference to `of_iomap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: timer-of.c:(.init.text+0x6ec): undefined reference to `iounmap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_cleanup': timer-of.c:(.init.text+0x8f2): undefined reference to `iounmap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: drivers/clocksource/timer-microchip-pit64b.o: in function `mchp_pit64b_dt_init_timer': timer-microchip-pit64b.c:(.init.text+0xf2): undefined reference to `of_iomap' gcc-9.3.0-nolibc/s390-linux/bin/s390-linux-ld: timer-microchip-pit64b.c:(.init.text+0xa18): undefined reference to `iounmap' iio: ERROR: modpost: "devm_platform_ioremap_resource" [drivers/iio/adc/adi-axi-adc.ko] undefined! pcmcia: ERROR: modpost: "ioremap" [drivers/pcmcia/pcmcia.ko] undefined! ERROR: modpost: "iounmap" [drivers/pcmcia/pcmcia.ko] undefined! mtd: ERROR: modpost: "devm_ioremap_resource" [drivers/mtd/nand/raw/denali_dt.ko] undefined! nvmem: ERROR: modpost: "memunmap" [drivers/nvmem/nvmem-rmem.ko] undefined! ERROR: modpost: "memremap" [drivers/nvmem/nvmem-rmem.ko] undefined! crypto: ERROR: modpost: "devm_ioremap_resource" [drivers/crypto/ccree/ccree.ko] undefined! ERROR: modpost: "debugfs_create_regset32" [drivers/crypto/ccree/ccree.ko] undefined! media: ERROR: modpost: "devm_ioremap_resource" [drivers/media/rc/ir-hix5hd2.ko] undefined! input: ERROR: modpost: "devm_ioremap" [drivers/input/keyboard/samsung-keypad.ko] undefined! net: ERROR: modpost: "devm_platform_ioremap_resource" [drivers/net/can/grcan.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/arcnet/arc-rimi.ko] undefined! ERROR: modpost: "ioremap" [drivers/net/arcnet/arc-rimi.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/arcnet/com90xx.ko] undefined! ERROR: modpost: "ioremap" [drivers/net/arcnet/com90xx.ko] undefined! ERROR: modpost: "devm_ioremap" [drivers/net/ethernet/altera/altera_tse.ko] undefined! ERROR: modpost: "ioremap" [drivers/net/ethernet/xircom/xirc2ps_cs.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/ethernet/xircom/xirc2ps_cs.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/net/ethernet/xilinx/xilinx_emac.ko] undefined! ERROR: modpost: "of_address_to_resource" [drivers/net/ethernet/xilinx/xilinx_emac.ko] undefined! ERROR: modpost: "of_address_to_resource" [drivers/net/ethernet/xilinx/xilinx_emaclite.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/net/ethernet/xilinx/xilinx_emaclite.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource_byname" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "of_address_to_resource" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "devm_of_iomap" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "ioremap" [drivers/net/ethernet/smsc/smc91c92_cs.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/ethernet/smsc/smc91c92_cs.ko] undefined! ERROR: modpost: "ioremap" [drivers/net/ethernet/fujitsu/fmvj18x_cs.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/ethernet/fujitsu/fmvj18x_cs.ko] undefined! ERROR: modpost: "ioremap" [drivers/net/ethernet/8390/pcnet_cs.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/ethernet/8390/pcnet_cs.ko] undefined! char: ERROR: modpost: "devm_platform_ioremap_resource" [drivers/char/xillybus/xillybus_of.ko] undefined! tty: ERROR: modpost: "ioremap" [drivers/tty/ipwireless/ipwireless.ko] undefined! ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko] undefined! dma: ERROR: modpost: "devm_ioremap_resource" [drivers/dma/sf-pdma/sf-pdma.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/idma64.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/fsl-edma.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource" [drivers/dma/dw/dw_dmac.ko] undefined! ERROR: modpost: "devm_ioremap" [drivers/dma/altera-msgdma.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource" [drivers/dma/xilinx/xilinx_dpdma.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma_mgmt.ko] undefined! ERROR: modpost: "of_address_to_resource" [drivers/dma/qcom/hdma_mgmt.ko] undefined! make[1]: Leaving directory 'linux-next-20210315/S390' -- ~Randy
