# git rev-parse -q --verify 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e^{commit} 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e already have revision, skipping fetch # git checkout -q -f -B kisskb 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e # git clean -qxdf # < git log -1 # commit 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e # Author: Linus Torvalds # Date: Tue Feb 23 12:21:58 2021 -0800 # # Kbuild: disable TRIM_UNUSED_KSYMS option # # The removal of EXPORT_UNUSED_SYMBOL() in commit 367948220fce looks like # (and was sold as) a no-op, but it actually had a rather serious and # subtle side effect: the UNUSED_SYMBOLS option not only enabled the # removed (unused) functionality, it also _disabled_ the TRIM_UNUSED_KSYMS # functionality. # # And it turns out that TRIM_UNUSED_KSYMS is a huge time waste, and takes # up a third of the kernel build time for me. For no actual upside, since # no distro is likely to ever be able to enable it (because they all # support external kernel modules). # # Rather than re-enable EXPORT_UNUSED_SYMBOL, this just disables the # TRIM_UNUSED_KSYMS option by marking it broken. I'm tempted to just # remove the support entirely, but maybe somebody has a use-case and can # fix the behavior of it. # # I could have just disabled it for COMPILE_TEST, but it really smells # like the TRIM_UNUSED_KSYMS option is badly done and not really useful, # so this takes the more direct approach - let's see if anybody ever # actually notices or complains. # # Cc: Miroslav Benes # Cc: Emil Velikov # Cc: Christoph Hellwig # Cc: Jessica Yu # Fixes: 367948220fce ("module: remove EXPORT_UNUSED_SYMBOL*") # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 5cf0fd591f2e7833405bdc7ce2176c3502e8a11e # < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 allyesconfig # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_KCOV=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n # Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n # Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n # Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n # Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n # Added to kconfig CONFIG_UML_NET=n # Added to kconfig CONFIG_UML_NET_ETHERTAP=n # Added to kconfig CONFIG_UML_NET_TUNTAP=n # Added to kconfig CONFIG_UML_NET_SLIP=n # Added to kconfig CONFIG_UML_NET_DAEMON=n # Added to kconfig CONFIG_UML_NET_VDE=n # Added to kconfig CONFIG_UML_NET_MCAST=n # Added to kconfig CONFIG_UML_NET_PCAP=n # Added to kconfig CONFIG_UML_NET_SLIRP=n # Added to kconfig CONFIG_GCOV_KERNEL=n # Added to kconfig CONFIG_DEBUG_INFO_BTF=n # Added to kconfig CONFIG_BPF_PRELOAD=n # < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help # make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig .config:4537:warning: override: reassigning to symbol GCC_PLUGIN_CYC_COMPLEXITY .config:4539:warning: override: reassigning to symbol GCC_PLUGIN_LATENT_ENTROPY .config:4543:warning: override: reassigning to symbol UML_NET_ETHERTAP .config:4545:warning: override: reassigning to symbol UML_NET_SLIP .config:4548:warning: override: reassigning to symbol UML_NET_MCAST .config:4550:warning: override: reassigning to symbol UML_NET_SLIRP # make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: /kisskb/src/arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] drivers/net/ethernet/xilinx/ll_temac_main.o: In function `temac_probe': /kisskb/src/drivers/net/ethernet/xilinx/ll_temac_main.c:1409: undefined reference to `devm_platform_ioremap_resource_byname' /kisskb/src/drivers/net/ethernet/xilinx/ll_temac_main.c:1476: undefined reference to `devm_of_iomap' /kisskb/src/drivers/net/ethernet/xilinx/ll_temac_main.c:1502: undefined reference to `devm_platform_ioremap_resource' drivers/net/ethernet/xilinx/xilinx_emaclite.o: In function `xemaclite_of_probe': /kisskb/src/drivers/net/ethernet/xilinx/xilinx_emaclite.c:1146: undefined reference to `devm_ioremap_resource' drivers/net/ethernet/xilinx/xilinx_axienet_main.o: In function `axienet_probe': /kisskb/src/drivers/net/ethernet/xilinx/xilinx_axienet_main.c:1879: undefined reference to `devm_ioremap_resource' /kisskb/src/drivers/net/ethernet/xilinx/xilinx_axienet_main.c:1987: undefined reference to `devm_ioremap_resource' /kisskb/src/drivers/net/ethernet/xilinx/xilinx_axienet_main.c:1997: undefined reference to `devm_ioremap_resource' drivers/iio/adc/adi-axi-adc.o: In function `adi_axi_adc_probe': /kisskb/src/drivers/iio/adc/adi-axi-adc.c:415: undefined reference to `devm_platform_ioremap_resource' collect2: error: ld returned 1 exit status make[1]: *** [/kisskb/src/Makefile:1191: vmlinux] Error 1 make: *** [Makefile:185: __sub-make] Error 2 Command 'make -s -j 48 ARCH=um O=/kisskb/build/linus_um-allyesconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus_um-allyesconfig_um-x86_64 # Build took: 0:05:16.684982