# 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/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 58b278f568f0509497e2df7310bfd719156a60d1
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/walnut_defconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_40x.S:804: Warning: invalid register expression
INFO: Uncompressed kernel (size 0x4fe5a0) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Completed OK
# rm -rf /kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5
# Build took: 0:00:43.859359