Buildresult: powerpc-next/x86_64-defconfig/x86_64-gcc8 built on Jul 16 2020, 16:42

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Status:	OK
Date/Time:	Jul 16 2020, 16:42
Duration:	0:03:51.083820
Builder:	ka2
Revision:	powerpc/vdso: Fix vdso cpu truncation (`a9f675f950a07d5c1dbcbb97aabac56f5ed085e3)`
Target:	powerpc-next/x86_64-defconfig/x86_64-gcc8
Branch:	powerpc-next
Compiler:	x86_64-gcc8 (x86_64-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30)
Config:	defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify a9f675f950a07d5c1dbcbb97aabac56f5ed085e3^{commit} a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 already have revision, skipping fetch # git checkout -q -f -B kisskb a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 # git clean -qxdf # < git log -1 # commit a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 # Author: Milton Miller <miltonm@us.ibm.com> # Date: Thu Jul 16 09:37:04 2020 +1000 # # powerpc/vdso: Fix vdso cpu truncation # # The code in vdso_cpu_init that exposes the cpu and numa node to # userspace via SPRG_VDSO incorrctly masks the cpu to 12 bits. This means # that any kernel running on a box with more than 4096 threads (NR_CPUS # advertises a limit of of 8192 cpus) would expose userspace to two cpu # contexts running at the same time with the same cpu number. # # Note: I'm not aware of any distro shipping a kernel with support for more # than 4096 threads today, nor of any system image that currently exceeds # 4096 threads. Found via code browsing. # # Fixes: 18ad51dd342a7eb09dbcd059d0b451b616d4dafc ("powerpc: Add VDSO version of getcpu") # Signed-off-by: Milton Miller <miltonm@us.ibm.com> # Signed-off-by: Anton Blanchard <anton@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20200715233704.1352257-1-anton@ozlabs.org # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 # < make -s -j 8 ARCH=x86 O=/kisskb/build/powerpc-next_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- x86_64_defconfig # < make -s -j 8 ARCH=x86 O=/kisskb/build/powerpc-next_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- help # make -s -j 8 ARCH=x86 O=/kisskb/build/powerpc-next_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- olddefconfig # make -s -j 8 ARCH=x86 O=/kisskb/build/powerpc-next_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- Completed OK # rm -rf /kisskb/build/powerpc-next_x86_64_defconfig_x86_64-gcc8 # Build took: 0:03:51.083820

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