# git rev-parse -q --verify 458ef2a25e0cbdc216012aa2b9cf549d64133b08^{commit} 458ef2a25e0cbdc216012aa2b9cf549d64133b08 already have revision, skipping fetch # git checkout -q -f -B kisskb 458ef2a25e0cbdc216012aa2b9cf549d64133b08 # git clean -qxdf # < git log -1 # commit 458ef2a25e0cbdc216012aa2b9cf549d64133b08 # Merge: 2853d5fafb1e fac01d11722c # Author: Linus Torvalds # Date: Mon Mar 30 19:55:39 2020 -0700 # # Merge tag 'x86-timers-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip # # Pull x86 timer updates from Thomas Gleixner: # "A series of commits to make the MSR derived CPU and TSC frequency more # accurate. # # It turned out that the frequency tables which have been taken from the # SDM are inaccurate because the SDM provides truncated and rounded # values, e.g. 83.3Mhz (83.3333...) or 116.7Mhz (116.6666...). # # This causes time drift in the range of ~1 second per hour (20-30 # seconds per day). On some of these SoCs it's not possible to # recalibrate the TSC because there is no reference (PIT, HPET) # available. # # With some reverse engineering it was established that the possible # frequencies are derived from the base clock with fixed multiplier / # divider pairs. # # For the CPU models which have a known crystal frequency the kernel now # uses multiplier / divider pairs which bring the frequencies closer to # reality and fix the observed time drift issues" # # * tag 'x86-timers-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: # x86/tsc_msr: Make MSR derived TSC frequency more accurate # x86/tsc_msr: Fix MSR_FSB_FREQ mask for Cherry Trail devices # x86/tsc_msr: Use named struct initializers # < /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 458ef2a25e0cbdc216012aa2b9cf549d64133b08 # < make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- randconfig KCONFIG_SEED=0xF6BA0F8 # Added to kconfig CONFIG_STANDALONE=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_GCC_PLUGIN_CYC_COMPLEXITY=n # Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n # Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n # < make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_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 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux- olddefconfig .config:4581:warning: override: reassigning to symbol STANDALONE # make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_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/linus-rand_x86_64-randconfig_x86_64-gcc8 # Build took: 0:05:17.391102