Buildresult: linus-rand/powerpc-randconfig/powerpc-gcc4.6 built on Oct 16 2019, 06:19

kisskb

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Status:	OK
Date/Time:	Oct 16 2019, 06:19
Duration:	0:03:15.332978
Builder:	ka2
Revision:	sparc64: disable fast-GUP due to unexplained oopses (`8e0d0ad206f08506c893326ca7c9c3d9cc042cef)`
Target:	linus-rand/powerpc-randconfig/powerpc-gcc4.6
Branch:	linus-rand
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	randconfig (download)
Log:	Download original Possible warnings (14) kernel/printk/printk.c:204:16: warning: 'old' 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] drivers/base/regmap/regmap.c:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] block/blk.h:78:50: warning: 'bvprv.bv_offset' may be used uninitialized in this function [-Wuninitialized] block/blk.h:81:12: warning: 'bvprv.bv_len' may be used uninitialized in this function [-Wuninitialized] arch/powerpc/include/asm/io.h:802:22: warning: 'bvprv.bv_page' may be used uninitialized in this function [-Wuninitialized] kernel/watchdog.c:47:23: warning: 'watchdog_allowed_mask' defined but not used [-Wunused-variable] kernel/seccomp.c:917:1: warning: no return statement in function returning non-void [-Wreturn-type] fs/f2fs/file.c:3095:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] include/linux/string.h:299:29: warning: array subscript is above array bounds [-Warray-bounds] include/linux/list.h:63:13: warning: 'head' may be used uninitialized in this function [-Wuninitialized] drivers/nvdimm/region_devs.c:937:20: warning: 'nd_region' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] fs/btrfs/ref-verify.c:542:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 8e0d0ad206f08506c893326ca7c9c3d9cc042cef^{commit} 8e0d0ad206f08506c893326ca7c9c3d9cc042cef already have revision, skipping fetch # git checkout -q -f -B kisskb 8e0d0ad206f08506c893326ca7c9c3d9cc042cef # git clean -qxdf # < git log -1 # commit 8e0d0ad206f08506c893326ca7c9c3d9cc042cef # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Tue Oct 15 09:56:36 2019 -0700 # # sparc64: disable fast-GUP due to unexplained oopses # # HAVE_FAST_GUP enables the lockless quick page table walker for simple # cases, and is a nice optimization for some random loads that can then # use get_user_pages_fast() rather than the more careful page walker. # # However, for some unexplained reason, it seems to be subtly broken on # sparc64. The breakage is only with some compiler versions and some # hardware, and nobody seems to have figured out what triggers it, # although there's a simple reprodicer for the problem when it does # trigger. # # The problem was introduced with the conversion to the generic GUP code # in commit 7b9afb86b632 ("sparc64: use the generic get_user_pages_fast # code"), but nothing looks obviously wrong in that conversion. It may be # a compiler bug that just hits us with the code reorganization. Or it # may be something very specific to sparc64. # # This disables HAVE_FAST_GUP entirely. That makes things like futexes a # bit slower, but at least they work. If we can figure out the trigger, # that would be lovely, but it's been three months already.. # # Link: https://lore.kernel.org/lkml/20190717215956.GA30369@altlinux.org/ # Fixes: 7b9afb86b632 ("sparc64: use the generic get_user_pages_fast code") # Reported-by: Dmitry V Levin <ldv@altlinux.org> # Reported-by: Anatoly Pugachev <matorola@gmail.com> # Requested-by: Meelis Roos <mroos@linux.ee> # Suggested-by: Christoph Hellwig <hch@infradead.org> # Cc: David Miller <davem@davemloft.net> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /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 8e0d0ad206f08506c893326ca7c9c3d9cc042cef # < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- randconfig KCONFIG_SEED=0x41315860 # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_CPU_BIG_ENDIAN=y # Added to kconfig CONFIG_PPC64=y # Added to kconfig CONFIG_PPC_DISABLE_WERROR=y # Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y # Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n # Added to kconfig CONFIG_UBSAN=n # yes \n \| make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- oldconfig yes: standard output: Broken pipe # make -s -j 48 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /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/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/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/block/blk-merge.c: In function 'blk_rq_map_sg': /kisskb/src/block/blk.h:78:50: warning: 'bvprv.bv_offset' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/block/blk-merge.c:466:42: note: 'bvprv.bv_offset' was declared here /kisskb/src/block/blk.h:81:12: warning: 'bvprv.bv_len' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/block/blk-merge.c:466:42: note: 'bvprv.bv_len' was declared here /kisskb/src/arch/powerpc/include/asm/io.h:802:22: warning: 'bvprv.bv_page' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/block/blk-merge.c:466:42: note: 'bvprv.bv_page' was declared here /kisskb/src/kernel/watchdog.c:47:23: warning: 'watchdog_allowed_mask' defined but not used [-Wunused-variable] /kisskb/src/kernel/seccomp.c: In function '__seccomp_filter': /kisskb/src/kernel/seccomp.c:917:1: warning: no return statement in function returning non-void [-Wreturn-type] /kisskb/src/fs/f2fs/file.c: In function 'f2fs_precache_extents': /kisskb/src/fs/f2fs/file.c:3095:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/lightnvm/core.c: In function 'nvm_ioctl_dev_create.isra.16': /kisskb/src/include/linux/string.h:299:29: warning: array subscript is above array bounds [-Warray-bounds] /kisskb/src/fs/f2fs/node.c: In function '__set_nat_cache_dirty': /kisskb/src/include/linux/list.h:63:13: warning: 'head' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/f2fs/node.c:236:24: note: 'head' was declared here /kisskb/src/drivers/nvdimm/region_devs.c: In function 'nd_region_create': /kisskb/src/drivers/nvdimm/region_devs.c:937:20: warning: 'nd_region' 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/fs/btrfs/ref-verify.c: In function 'btrfs_build_ref_tree': /kisskb/src/fs/btrfs/ref-verify.c:542:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/btrfs/ref-verify.c:439:12: note: 'ret' was declared here Completed OK # rm -rf /kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.6 # Build took: 0:03:15.332978

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