# git rev-parse -q --verify abc3fce76adbdfa8f87272c784b388cd20b46049^{commit}
abc3fce76adbdfa8f87272c784b388cd20b46049
already have revision, skipping fetch
# git checkout -q -f -B kisskb abc3fce76adbdfa8f87272c784b388cd20b46049
# git clean -qxdf
# < git log -1
# commit abc3fce76adbdfa8f87272c784b388cd20b46049
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Thu Apr 2 22:04:01 2020 +1000
# 
#     Revert "powerpc/64: irq_work avoid interrupt when called with hardware irqs enabled"
#     
#     This reverts commit ebb37cf3ffd39fdb6ec5b07111f8bb2f11d92c5f.
#     
#     That commit does not play well with soft-masked irq state
#     manipulations in idle, interrupt replay, and possibly others due to
#     tracing code sometimes using irq_work_queue (e.g., in
#     trace_hardirqs_on()). That can cause PACA_IRQ_DEC to become set when
#     it is not expected, and be ignored or cleared or cause warnings.
#     
#     The net result seems to be missing an irq_work until the next timer
#     interrupt in the worst case which is usually not going to be noticed,
#     however it could be a long time if the tick is disabled, which is
#     against the spirit of irq_work and might cause real problems.
#     
#     The idea is still solid, but it would need more work. It's not really
#     clear if it would be worth added complexity, so revert this for
#     now (not a straight revert, but replace with a comment explaining why
#     we might see interrupts happening, and gives git blame something to
#     find).
#     
#     Fixes: ebb37cf3ffd3 ("powerpc/64: irq_work avoid interrupt when called with hardware irqs enabled")
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200402120401.1115883-1-npiggin@gmail.com
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 abc3fce76adbdfa8f87272c784b388cd20b46049
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  defconfig
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 24 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 24 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:35: LSE atomics not supported by binutils
In file included from /kisskb/src/include/linux/rwsem.h:16:0,
                 from /kisskb/src/include/linux/notifier.h:15,
                 from /kisskb/src/include/linux/clk.h:14,
                 from /kisskb/src/drivers/tty/serial/sh-sci.c:20:
/kisskb/src/drivers/tty/serial/sh-sci.c: In function 'sci_dma_rx_submit':
/kisskb/src/include/linux/spinlock.h:288:3: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized]
   _raw_spin_unlock_irqrestore(lock, flags); \
   ^
/kisskb/src/drivers/tty/serial/sh-sci.c:1348:16: note: 'flags' was declared here
  unsigned long flags;
                ^
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c: In function 'sh_mobile_i2c_isr':
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized]
   pd->msg->buf[real_pos] = data;
                          ^
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:372:16: note: 'data' was declared here
  unsigned char data;
                ^
Completed OK
# rm -rf /kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4
# Build took: 0:05:59.006367