# git rev-parse -q --verify 442489c219235991de86d0277b5d859ede6d8792^{commit}
442489c219235991de86d0277b5d859ede6d8792
already have revision, skipping fetch
# git checkout -q -f -B kisskb 442489c219235991de86d0277b5d859ede6d8792
# git clean -qxdf
# < git log -1
# commit 442489c219235991de86d0277b5d859ede6d8792
# Merge: f8b036a7fc23 31cd0e119d50
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Aug 4 18:17:37 2020 -0700
# 
#     Merge tag 'timers-core-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
#     
#     Pull timer updates from Thomas Gleixner:
#      "Time, timers and related driver updates:
#     
#        - Prevent unnecessary timer softirq invocations by extending the
#          tracking of the next expiring timer in the timer wheel beyond the
#          existing NOHZ functionality.
#     
#          The tracking overhead at enqueue time is within the noise, but on
#          sensitive workloads the avoidance of the soft interrupt invocation
#          is a measurable improvement.
#     
#        - The obligatory new clocksource driver for Ingenic X100 OST
#     
#        - The usual fixes, improvements, cleanups and extensions for newer
#          chip variants all over the driver space"
#     
#     * tag 'timers-core-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (28 commits)
#       timers: Recalculate next timer interrupt only when necessary
#       clocksource/drivers/ingenic: Add support for the Ingenic X1000 OST.
#       dt-bindings: timer: Add Ingenic X1000 OST bindings.
#       clocksource/drivers: Replace HTTP links with HTTPS ones
#       clocksource/drivers/nomadik-mtu: Handle 32kHz clock
#       clocksource/drivers/sh_cmt: Use "kHz" for kilohertz
#       clocksource/drivers/imx: Add support for i.MX TPM driver with ARM64
#       clocksource/drivers/ingenic: Add high resolution timer support for SMP/SMT.
#       timers: Lower base clock forwarding threshold
#       timers: Remove must_forward_clk
#       timers: Spare timer softirq until next expiry
#       timers: Expand clk forward logic beyond nohz
#       timers: Reuse next expiry cache after nohz exit
#       timers: Always keep track of next expiry
#       timers: Optimize _next_timer_interrupt() level iteration
#       timers: Add comments about calc_index() ceiling work
#       timers: Move trigger_dyntick_cpu() to enqueue_timer()
#       timers: Use only bucket expiry for base->next_expiry value
#       timers: Preserve higher bits of expiration on index calculation
#       clocksource/drivers/timer-atmel-tcb: Add sama5d2 support
#       ...
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 442489c219235991de86d0277b5d859ede6d8792
# < make -s -j 8 ARCH=arm O=/kisskb/build/linus_imx_v6_v7_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  imx_v6_v7_defconfig
# < make -s -j 8 ARCH=arm O=/kisskb/build/linus_imx_v6_v7_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 8 ARCH=arm O=/kisskb/build/linus_imx_v6_v7_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 8 ARCH=arm O=/kisskb/build/linus_imx_v6_v7_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
In file included from /kisskb/src/include/linux/time.h:6:0,
                 from /kisskb/src/include/linux/ktime.h:24,
                 from /kisskb/src/include/linux/timer.h:6,
                 from /kisskb/src/include/linux/workqueue.h:9,
                 from /kisskb/src/include/linux/rhashtable-types.h:15,
                 from /kisskb/src/include/linux/ipc.h:7,
                 from /kisskb/src/include/uapi/linux/sem.h:5,
                 from /kisskb/src/include/linux/sem.h:5,
                 from /kisskb/src/include/linux/sched.h:15,
                 from /kisskb/src/arch/arm/kernel/asm-offsets.c:11:
/kisskb/src/include/linux/seqlock.h: In function 'write_seqcount_begin_nested':
/kisskb/src/include/linux/seqlock.h:285:2: error: implicit declaration of function 'raw_smp_processor_id' [-Werror=implicit-function-declaration]
  lockdep_assert_preemption_disabled();
  ^
cc1: some warnings being treated as errors
make[2]: *** [/kisskb/src/scripts/Makefile.build:114: arch/arm/kernel/asm-offsets.s] Error 1
make[1]: *** [/kisskb/src/Makefile:1185: prepare0] Error 2
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 8 ARCH=arm O=/kisskb/build/linus_imx_v6_v7_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_imx_v6_v7_defconfig_arm-gcc4.9
# Build took: 0:00:06.267064