# git rev-parse -q --verify 324332cb5445aa6470fe57ba6ddcfbc9504958e2^{commit} 324332cb5445aa6470fe57ba6ddcfbc9504958e2 already have revision, skipping fetch # git checkout -q -f -B kisskb 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # git clean -qxdf # < git log -1 # commit 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # Author: Nathan Chancellor # Date: Mon Nov 18 21:57:12 2019 -0700 # # powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp # # LLVM revision r374662 gives LLVM the ability to convert certain loops # into a reference to bcmp as an optimization; this breaks # prom_init_check.sh: # # CALL arch/powerpc/kernel/prom_init_check.sh # Error: External symbol 'bcmp' referenced from prom_init.c # make[2]: *** [arch/powerpc/kernel/Makefile:196: prom_init_check] Error 1 # # bcmp is defined in lib/string.c as a wrapper for memcmp so this could # be added to the whitelist. However, commit # 450e7dd4001f ("powerpc/prom_init: don't use string functions from # lib/") copied memcmp as prom_memcmp to avoid KASAN instrumentation so # having bcmp be resolved to regular memcmp would break that assumption. # Furthermore, because the compiler is the one that inserted bcmp, we # cannot provide something like prom_bcmp. # # To prevent LLVM from being clever with optimizations like this, use # -ffreestanding to tell LLVM we are not hosted so it is not free to # make transformations like this. # # Reviewed-by: Nick Desaulneris # Signed-off-by: Nathan Chancellor # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20191119045712.39633-4-natechancellor@gmail.com # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # < make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc44x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc44x_defconfig # make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc44x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/arch/powerpc/boot/dts/virtex440-ml510.dts:335.37-439.6: Warning (pci_bridge): /plb@0/plbv46-pci@85e00000: node name is not "pci" or "pcie" arch/powerpc/boot/dts/virtex440-ml510.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec.isra.37': /kisskb/src/net/bridge/br_netlink.c:648:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1749:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:228:19: note: 'i' was declared here /kisskb/src/drivers/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/powerpc/boot/dts/katmai.dts:322.26-361.5: Warning (pci_bridge): /plb/pciex@d00000000: node name is not "pci" or "pcie" /kisskb/src/arch/powerpc/boot/dts/katmai.dts:363.26-402.5: Warning (pci_bridge): /plb/pciex@d20000000: node name is not "pci" or "pcie" /kisskb/src/arch/powerpc/boot/dts/katmai.dts:404.26-443.5: Warning (pci_bridge): /plb/pciex@d40000000: node name is not "pci" or "pcie" arch/powerpc/boot/dts/katmai.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5433e8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:18 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2689510 Bytes = 2626.47 KiB = 2.56 MiB Load Address: 00000000 Entry Point: 00000000 INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:18 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2722975 Bytes = 2659.16 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006000c8 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:18 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2722703 Bytes = 2658.89 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006001bc INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x553a94) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:19 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2722770 Bytes = 2658.96 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014e0 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:19 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2723084 Bytes = 2659.26 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014d8 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:19 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2723041 Bytes = 2659.22 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014e0 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:19 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2722940 Bytes = 2659.12 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014e0 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:19 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2722842 Bytes = 2659.03 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014ec Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:19 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2722807 Bytes = 2658.99 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014cc Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:02:20 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2723063 Bytes = 2659.24 KiB = 2.60 MiB Load Address: 00600000 Entry Point: 006014c0 Completed OK # rm -rf /kisskb/build/powerpc-next_ppc44x_defconfig_powerpc-gcc4.6 # Build took: 0:01:44.184862