Buildresult: kbuild/mips-defconfig/mips-gcc4.6 built on Apr 8 2020, 01:24

kisskb

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Status:	OK
Date/Time:	Apr 8 2020, 01:24
Duration:	0:01:44.554809
Builder:	blade46
Revision:	kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y (`58bb4f7d4970e92c2400208a1b48aae3b2853e5c)`
Target:	kbuild/mips-defconfig/mips-gcc4.6
Branch:	kbuild
Compiler:	mips-gcc4.6 (mips-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	defconfig (download)
Log:	Download original Possible warnings (15) warning: The last gc run reported the following. Please correct the root cause warning: There are too many unreachable loose objects; run 'git prune' to remove them. kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] net/core/devlink.c:4957:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] kernel/futex.c:1676:3: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1859:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2598:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] net/bridge/br_netlink.c:571:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] fs/namei.c:1805:10: warning: 'inode' may be used uninitialized in this function [-Wuninitialized] fs/namei.c:1805:10: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] fs/io_uring.c:6617:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 58bb4f7d4970e92c2400208a1b48aae3b2853e5c^{commit} # git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-kbuild.git for-next warning: The last gc run reported the following. Please correct the root cause and remove .git/gc.log. Automatic cleanup will not be performed until the file is removed. warning: There are too many unreachable loose objects; run 'git prune' to remove them. # git rev-parse -q --verify 58bb4f7d4970e92c2400208a1b48aae3b2853e5c^{commit} 58bb4f7d4970e92c2400208a1b48aae3b2853e5c # git checkout -q -f -B kisskb 58bb4f7d4970e92c2400208a1b48aae3b2853e5c # git clean -qxdf # < git log -1 # commit 58bb4f7d4970e92c2400208a1b48aae3b2853e5c # Author: Masahiro Yamada <masahiroy@kernel.org> # Date: Thu Mar 12 07:37:25 2020 +0900 # # kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y # # Kbuild supports not only obj-y but also lib-y to list objects linked to # vmlinux. # # The difference between them is that all the objects from obj-y are # forcibly linked to vmlinux, whereas the objects from lib-y are linked # as needed; if there is no user of a lib-y object, it is not linked. # # lib-y is intended to list utility functions that may be called from all # over the place (and may be unused at all), but it is a problem for # EXPORT_SYMBOL(). Even if there is no call-site in the vmlinux, we need # to keep exported symbols for the use from loadable modules. # # Commit 7f2084fa55e6 ("[kbuild] handle exports in lib-y objects reliably") # worked around it by linking a dummy object, lib-ksyms.o, which contains # references to all the symbols exported from lib.a in that directory. # It uses the linker script command, EXTERN. Unfortunately, the meaning of # EXTERN of ld.lld is different from that of ld.bfd. Therefore, this does # not work with LD=ld.lld (CBL issue #515). # # Anyway, the build rule of lib-ksyms.o is somewhat tricky. So, I want to # get rid of it. # # At first, I was thinking of accumulating lib-y objects into obj-y # (or even replacing lib-y with obj-y entirely), but the lib-y syntax # is used beyond the ordinary use in lib/ and arch/*/lib/. # # Examples: # # - drivers/firmware/efi/libstub/Makefile builds lib.a, which is linked # into vmlinux in the own way (arm64), or linked to the decompressor # (arm, x86). # # - arch/alpha/lib/Makefile builds lib.a which is linked not only to # vmlinux, but also to bootloaders in arch/alpha/boot/Makefile. # # - arch/xtensa/boot/lib/Makefile builds lib.a for use from # arch/xtensa/boot/boot-redboot/Makefile. # # One more thing, adding everything to obj-y would increase the vmlinux # size of allnoconfig (or tinyconfig). # # For less impact, I tweaked the destination of lib.a at the top Makefile; # when CONFIG_MODULES=y, lib.a goes to KBUILD_VMLINUX_OBJS, which is # forcibly linked to vmlinux, otherwise lib.a goes to KBUILD_VMLINUX_LIBS # as before. # # The size impact for normal usecases is quite small since at lease one # symbol in every lib-y object is eventually called by someone. In case # you are intrested, here are the figures. # # x86_64_defconfig: # # text data bss dec hex filename # 19566602 5422072 1589328 26578002 1958c52 vmlinux.before # 19566932 5422104 1589328 26578364 1958dbc vmlinux.after # # The case with the biggest impact is allnoconfig + CONFIG_MODULES=y. # # ARCH=x86 allnoconfig + CONFIG_MODULES=y: # # text data bss dec hex filename # 1175162 254740 1220608 2650510 28718e vmlinux.before # 1177974 254836 1220608 2653418 287cea vmlinux.after # # Hopefully this is still not a big deal. The per-file trimming with the # static library is not so effective after all. # # If fine-grained optimization is desired, some architectures support # CONFIG_LD_DEAD_CODE_DATA_ELIMINATION, which trims dead code per-symbol # basis. When LTO is supported in mainline, even better optimization will # be possible. # # Link: https://github.com/ClangBuiltLinux/linux/issues/515 # Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> # Reported-by: kbuild test robot <lkp@intel.com> # Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-ld --version # < git log --format=%s --max-count=1 58bb4f7d4970e92c2400208a1b48aae3b2853e5c # < make -s -j 32 ARCH=mips O=/kisskb/build/kbuild_mips-defconfig_mips-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- defconfig # < make -s -j 32 ARCH=mips O=/kisskb/build/kbuild_mips-defconfig_mips-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- help # make -s -j 32 ARCH=mips O=/kisskb/build/kbuild_mips-defconfig_mips-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- olddefconfig # make -s -j 32 ARCH=mips O=/kisskb/build/kbuild_mips-defconfig_mips-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- /kisskb/src/arch/mips/vdso/Makefile:69: MIPS VDSO requires binutils >= 2.25 /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/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:401:21: note: 'pdeo' was declared here /kisskb/src/net/core/devlink.c: In function 'devlink_fmsg_prepare_skb': /kisskb/src/net/core/devlink.c:4957:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/futex.c: In function 'do_futex': /kisskb/src/kernel/futex.c:1676:3: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/futex.c:1652:6: note: 'oldval' was declared here /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1859:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2598:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_process_vlan_info': /kisskb/src/net/bridge/br_netlink.c:571:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/namei.c: In function 'handle_dots': /kisskb/src/fs/namei.c:1805:10: warning: 'inode' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/namei.c:1805:10: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update': /kisskb/src/fs/io_uring.c:6617:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/mips/vdso/Makefile:69: MIPS VDSO requires binutils >= 2.25 /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] FIT description: Linux 5.6.0-g58bb4f7d4970 Created: Wed Apr 8 01:26:11 2020 Image 0 (kernel@0) Description: Linux 5.6.0-g58bb4f7d4970 Created: Wed Apr 8 01:26:11 2020 Type: Kernel Image Compression: gzip compressed Data Size: 4479450 Bytes = 4374.46 KiB = 4.27 MiB Architecture: MIPS OS: Linux Load Address: 0x80100000 Entry Point: 0x808c17e0 Hash algo: sha1 Hash value: a793697ea8ebb73fc54b0a796c5fed3989034f7f Image 1 (fdt@boston) Description: img,boston Device Tree Created: Wed Apr 8 01:26:11 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 3793 Bytes = 3.70 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 4799f50d688573234da6e9d7701234d394759ef4 Image 2 (fdt@ni169445) Description: NI 169445 device tree Created: Wed Apr 8 01:26:11 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 1871 Bytes = 1.83 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 51b89b31605ee62038c8468c429af091dfc75ec7 Image 3 (fdt@ocelot_pcb123) Description: MSCC Ocelot PCB123 Device Tree Created: Wed Apr 8 01:26:11 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 4639 Bytes = 4.53 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 018897896b42c41c943aca35a20e4300dba250c8 Image 4 (fdt@ocelot_pcb120) Description: MSCC Ocelot PCB120 Device Tree Created: Wed Apr 8 01:26:11 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 5198 Bytes = 5.08 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 36c7bd0bd79cfc2f7dd6acda6c7996294f4967e6 Image 5 (fdt@xilfpga) Description: MIPSfpga (xilfpga) Device Tree Created: Wed Apr 8 01:26:11 2020 Type: Flat Device Tree Compression: uncompressed Data Size: 2708 Bytes = 2.64 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 63d058b780f65e22da30f0a183433765f1807f1d Default Configuration: 'conf@default' Configuration 0 (conf@default) Description: Generic Linux kernel Kernel: kernel@0 Configuration 1 (conf@boston) Description: Boston Linux kernel Kernel: kernel@0 FDT: fdt@boston Configuration 2 (conf@ni169445) Description: NI 169445 Linux Kernel Kernel: kernel@0 FDT: fdt@ni169445 Configuration 3 (conf@ocelot_pcb123) Description: Ocelot Linux kernel Kernel: kernel@0 FDT: fdt@ocelot_pcb123 Configuration 4 (conf@ocelot_pcb120) Description: Ocelot Linux kernel Kernel: kernel@0 FDT: fdt@ocelot_pcb120 Configuration 5 (conf@xilfpga) Description: MIPSfpga Linux kernel Kernel: kernel@0 FDT: fdt@xilfpga Completed OK # rm -rf /kisskb/build/kbuild_mips-defconfig_mips-gcc4.6 # Build took: 0:01:44.554809

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