[kbuild-all] Re: irq-loongson-pch-pic.c:undefined reference to `of_iomap'

On Mon, Nov 16, 2020 at 9:37 AM Geert Uytterhoeven <geert(a)linux-m68k.org&gt; wrote: > On Mon, Nov 16, 2020 at 9:33 AM Arnd Bergmann <arnd(a)kernel.org&gt; wrote: > > On Mon, Nov 16, 2020 at 5:33 AM Randy Dunlap <rdunlap(a)infradead.org&gt; wrote: > > > On 11/13/20 3:27 PM, kernel test robot wrote: > > (adding s390 folks to cc) > > > > I think fixing this requires a larger-scale effort. I tried building > > an s390 allmodconfig > > with CONFIG_PCI disabled, and got warnings and failures in many other places, > > see full log at the end of this mail. > > > > While in theory, all of those should depend on 'HAS_IOMEM' or some other symbol, > > keeping these dependencies sounds like an uphill battle, and there is not much > > to be gained from building the drivers for s390 on top of compile-testing them > > on more conventional architectures. > > Don't we need the dependencies on HAS_IOMEM for the CONFIG_UML=y > case, too? I would have expected that as well, but I don't see the problem when building an arch/um kernel, all I get is ERROR: modpost: "devm_platform_ioremap_resource" [drivers/iio/adc/adi-axi-adc.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource" [drivers/ptp/ptp_ines.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/net/ethernet/xilinx/xilinx_emac.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource_byname" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "devm_ioremap" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "devm_of_iomap" [drivers/net/ethernet/xilinx/ll_temac.ko] undefined! ERROR: modpost: "__open64_2" [fs/hostfs/hostfs.ko] undefined! If I disable those five drivers, I can build and link a uml kernel without warnings. I could not find the difference compared to s390 here. Looking a bit further, I now find that we ended up disabling CONFIG_COMPILE_TEST entirely for arch/um, which is clearly an option that would also work for s390.