Buildresult: kbuild/mips-defconfig/mips-gcc4.6 built on Aug 30 2019, 05:40

kisskb

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Status:	OK
Date/Time:	Aug 30 2019, 05:40
Duration:	0:01:25.910475
Builder:	ka2
Revision:	kbuild: Do not enable -Wimplicit-fallthrough for clang for now (`e2079e93f562c7f7a030eb7642017ee5eabaaa10)`
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 (12) <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<U6be0>]' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] net/bridge/br_netlink.c:648:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] net/core/devlink.c:4443:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/usb/core/devio.c:613:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify e2079e93f562c7f7a030eb7642017ee5eabaaa10^{commit} e2079e93f562c7f7a030eb7642017ee5eabaaa10 already have revision, skipping fetch # git checkout -q -f -B kisskb e2079e93f562c7f7a030eb7642017ee5eabaaa10 # git clean -qxdf # < git log -1 # commit e2079e93f562c7f7a030eb7642017ee5eabaaa10 # Author: Nathan Chancellor <natechancellor@gmail.com> # Date: Mon Aug 26 17:41:55 2019 -0700 # # kbuild: Do not enable -Wimplicit-fallthrough for clang for now # # This functionally reverts commit bfd77145f35c ("Makefile: Convert # -Wimplicit-fallthrough=3 to just -Wimplicit-fallthrough for clang"). # # clang enabled support for -Wimplicit-fallthrough in C in r369414 [1], # which causes a lot of warnings when building the kernel for two reasons: # # 1. Clang does not support the /* fall through */ comments. There seems # to be a general consensus in the LLVM community that this is not # something they want to support. Joe Perches wrote a script to convert # all of the comments to a "fallthrough" keyword that will be added to # compiler_attributes.h [2] [3], which catches the vast majority of the # comments. There doesn't appear to be any consensus in the kernel # community when to do this conversion. # # 2. Clang and GCC disagree about falling through to final case statements # with no content or cases that simply break: # # https://godbolt.org/z/c8csDu # # This difference contributes at least 50 warnings in an allyesconfig # build for x86, not considering other architectures. This difference # will need to be discussed to see which compiler is right [4] [5]. # # [1]: https://github.com/llvm/llvm-project/commit/1e0affb6e564b7361b0aadb38805f26deff4ecfc # [2]: https://lore.kernel.org/lkml/61ddbb86d5e68a15e24ccb06d9b399bbf5ce2da7.camel@perches.com/ # [3]: https://lore.kernel.org/lkml/1d2830aadbe9d8151728a7df5b88528fc72a0095.1564549413.git.joe@perches.com/ # [4]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91432 # [5]: https://github.com/ClangBuiltLinux/linux/issues/636 # # Given these two problems need discussion and coordination, do not enable # -Wimplicit-fallthrough with clang right now. Add a comment to explain # what is going on as well. This commit should be reverted once these two # issues are fully flushed out and resolved. # # Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> # Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> # Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> # Acked-by: Nick Desaulniers <ndesaulniers@google.com> # Acked-by: Gustavo A. R. Silva <gustavo@embeddedor.com> # Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.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 e2079e93f562c7f7a030eb7642017ee5eabaaa10 # < make -s -j 48 ARCH=mips O=/kisskb/build/kbuild_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- defconfig # make -s -j 48 ARCH=mips O=/kisskb/build/kbuild_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux- /kisskb/src/arch/mips/vdso/Makefile:39: MIPS VDSO requires binutils >= 2.25 <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] /kisskb/src/arch/mips/vdso/Makefile:39: MIPS VDSO requires binutils >= 2.25 /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields': /kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<U6be0>]' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<U6be0>]' was declared here /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/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1852:6: 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:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec.isra.20': /kisskb/src/net/bridge/br_netlink.c:648:7: warning: 'err' 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/net/core/devlink.c: In function 'devlink_fmsg_prepare_skb': /kisskb/src/net/core/devlink.c:4443:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:613:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] /kisskb/src/arch/mips/vdso/Makefile:39: MIPS VDSO requires binutils >= 2.25 /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] FIT description: Linux 5.3.0-rc4-ge2079e93f562 Created: Fri Aug 30 05:41:42 2019 Image 0 (kernel@0) Description: Linux 5.3.0-rc4-ge2079e93f562 Created: Fri Aug 30 05:41:42 2019 Type: Kernel Image Compression: gzip compressed Data Size: 4527547 Bytes = 4421.43 KiB = 4.32 MiB Architecture: MIPS OS: Linux Load Address: 0x80100000 Entry Point: 0x80861430 Hash algo: sha1 Hash value: a67e3d2146358c5c88507c8c5d77d7574e184ae4 Image 1 (fdt@boston) Description: img,boston Device Tree Created: Fri Aug 30 05:41:42 2019 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: Fri Aug 30 05:41:42 2019 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: Fri Aug 30 05:41:42 2019 Type: Flat Device Tree Compression: uncompressed Data Size: 4615 Bytes = 4.51 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 8754eadee600cac22c9c34884cd901aac7e95e8a Image 4 (fdt@ocelot_pcb120) Description: MSCC Ocelot PCB120 Device Tree Created: Fri Aug 30 05:41:42 2019 Type: Flat Device Tree Compression: uncompressed Data Size: 5174 Bytes = 5.05 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 1ab7d0871c0a9345c6269fb491bf028224da8256 Image 5 (fdt@xilfpga) Description: MIPSfpga (xilfpga) Device Tree Created: Fri Aug 30 05:41:42 2019 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 # Build took: 0:01:25.910475

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