# git rev-parse -q --verify 58b278f568f0509497e2df7310bfd719156a60d1^{commit}
58b278f568f0509497e2df7310bfd719156a60d1
already have revision, skipping fetch
# git checkout -q -f -B kisskb 58b278f568f0509497e2df7310bfd719156a60d1
# git clean -qxdf
# < git log -1
# commit 58b278f568f0509497e2df7310bfd719156a60d1
# Author: Vaibhav Jain <vaibhav@linux.ibm.com>
# Date:   Wed Aug 28 13:57:29 2019 +0530
# 
#     powerpc: Provide initial documentation for PAPR hcalls
#     
#     This doc patch provides an initial description of the hcall op-codes
#     that are used by Linux kernel running as a guest (LPAR) on top of
#     PowerVM or any other sPAPR compliant hyper-visor (e.g qemu).
#     
#     Apart from documenting the hcalls the doc-patch also provides a
#     rudimentary overview of how hcall ABI, how they are issued with the
#     Linux kernel and how information/control flows between the guest and
#     hypervisor.
#     
#     Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
#     Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
#     Acked-by: Nicholas Piggin <npiggin@gmail.com>
#     [mpe: Add SPDX tag, add it to index.rst]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190828082729.16695-1-vaibhav@linux.ibm.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 58b278f568f0509497e2df7310bfd719156a60d1
# < make -s -j 48 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 48 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: 0:05:09.622636