# git rev-parse -q --verify 6ccb4ac2bf8a35c694ead92f8ac5530a16e8f2c8^{commit}
6ccb4ac2bf8a35c694ead92f8ac5530a16e8f2c8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6ccb4ac2bf8a35c694ead92f8ac5530a16e8f2c8
# git clean -qxdf
# < git log -1
# commit 6ccb4ac2bf8a35c694ead92f8ac5530a16e8f2c8
# Author: Greg Kurz <groug@kaod.org>
# Date:   Wed Sep 11 17:52:18 2019 +0200
# 
#     powerpc/xive: Fix bogus error code returned by OPAL
#     
#     There's a bug in skiboot that causes the OPAL_XIVE_ALLOCATE_IRQ call
#     to return the 32-bit value 0xffffffff when OPAL has run out of IRQs.
#     Unfortunatelty, OPAL return values are signed 64-bit entities and
#     errors are supposed to be negative. If that happens, the linux code
#     confusingly treats 0xffffffff as a valid IRQ number and panics at some
#     point.
#     
#     A fix was recently merged in skiboot:
#     
#     e97391ae2bb5 ("xive: fix return value of opal_xive_allocate_irq()")
#     
#     but we need a workaround anyway to support older skiboots already
#     in the field.
#     
#     Internally convert 0xffffffff to OPAL_RESOURCE which is the usual error
#     returned upon resource exhaustion.
#     
#     Cc: stable@vger.kernel.org # v4.12+
#     Signed-off-by: Greg Kurz <groug@kaod.org>
#     Reviewed-by: Cédric Le Goater <clg@kaod.org>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/156821713818.1985334.14123187368108582810.stgit@bahia.lan
# < /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 6ccb4ac2bf8a35c694ead92f8ac5530a16e8f2c8
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_NUMA=n
# yes \n | make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_ppc64le-gcc5
# Build took: 0:01:37.414464