# git rev-parse -q --verify 91288fcc5a7ebb6378f442916299dc20d037aa72^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git next-test
# git rev-parse -q --verify 91288fcc5a7ebb6378f442916299dc20d037aa72^{commit}
91288fcc5a7ebb6378f442916299dc20d037aa72
# git checkout -q -f -B kisskb 91288fcc5a7ebb6378f442916299dc20d037aa72
# git clean -qxdf
# < git log -1
# commit 91288fcc5a7ebb6378f442916299dc20d037aa72
# Author: Oliver O'Halloran <oohall@gmail.com>
# Date:   Wed Oct 23 12:36:35 2019 +1100
# 
#     powerpc/boot: Fix the initrd being overwritten under qemu
#     
#     When booting under OF the zImage expects the initrd address and size
#     to be passed to it using registers r3 and r4. SLOF (guest firmware
#     used by QEMU) currently doesn't do this so the zImage is not aware of
#     the initrd location. This can result in initrd corruption either
#     though the zImage extracting the vmlinux over the initrd, or by the
#     vmlinux overwriting the initrd when relocating itself.
#     
#     QEMU does put the linux,initrd-start and linux,initrd-end properties
#     into the devicetree to vmlinux to find the initrd. So we can work
#     around the problem by also looking for those properties in the zImage.
#     
#     Cc: stable@vger.kernel.org
#     Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191023013635.2512-1-oohall@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 91288fcc5a7ebb6378f442916299dc20d037aa72
# < 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-  
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:38: LSE atomics not supported by binutils
/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;
                ^
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:24:
/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:1352:16: note: 'flags' was declared here
  unsigned long flags;
                ^
Completed OK
# rm -rf /kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4
# Build took: 0:06:28.601600