# git rev-parse -q --verify 66763e9d1f6a8eda00da3a32c007b2af61412c10^{commit} 66763e9d1f6a8eda00da3a32c007b2af61412c10 already have revision, skipping fetch # git checkout -q -f -B kisskb 66763e9d1f6a8eda00da3a32c007b2af61412c10 # git clean -qxdf # git log -1 commit 66763e9d1f6a8eda00da3a32c007b2af61412c10 Author: Michael Ellerman Date: Tue Mar 13 15:58:11 2018 +1100 powerpc/64s: Fix NULL AT_BASE_PLATFORM when using DT CPU features When running virtualised the powerpc kernel is able to run the system in "compat mode" - which means the kernel and hardware are pretending to userspace that the CPU is an older version than it actually is. AT_BASE_PLATFORM is an AUXV entry that we export to userspace for use when we're running in that mode, which tells userspace the "platform" string for the real CPU version, as opposed to the faked version. Although we don't support compat mode when using DT CPU features, and arguably don't need to set AT_BASE_PLATFORM, the existing cputable based code always sets it even when we're running bare metal. That means the lack of AT_BASE_PLATFORM is a user-visible artifact of the fact that the kernel is using DT CPU features, which we don't want. So set it in the DT CPU features code also. This results in eg: $ LD_SHOW_AUXV=1 /bin/true | grep "AT_.*PLATFORM" AT_PLATFORM: power9 AT_BASE_PLATFORM:power9 Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 66763e9d1f6a8eda00da3a32c007b2af61412c10 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/sound/ppc/pmac.h:25:0, from /kisskb/src/sound/ppc/awacs.c:29: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:220:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^ /kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^ /kisskb/src/drivers/input/joystick/analog.c:176:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp] #warning Precise timer not defined for this architecture. ^ WARNING: modpost: Found 1 section mismatch(es). To see full details build your kernel with: 'make CONFIG_DEBUG_SECTION_MISMATCH=y' arch/powerpc/boot/mpc832x_rdb.dtb: Warning (interrupts_property): interrupts size is (4), expected multiple of 8 in /qe@e0100000/mdio@3120/ethernet-phy@0 arch/powerpc/boot/mpc832x_rdb.dtb: Warning (interrupts_property): interrupts size is (4), expected multiple of 8 in /qe@e0100000/mdio@3120/ethernet-phy@4 INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa556c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44f6c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44f6c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4895228 Bytes = 4780.50 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b007a0 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4895412 Bytes = 4780.68 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b007a0 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4871385 Bytes = 4757.21 kB = 4.65 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4894852 Bytes = 4780.13 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4894525 Bytes = 4779.81 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4894808 Bytes = 4780.09 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4894863 Bytes = 4780.14 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4895361 Bytes = 4780.63 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.16.0-rc2+ Created: Wed Mar 14 01:08:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4894922 Bytes = 4780.20 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b001f4 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-5.3 # Build took: 0:03:26.171819