# git rev-parse -q --verify 07a361072378fb3ae116db86244372dbd68f9ea3^{commit}
07a361072378fb3ae116db86244372dbd68f9ea3
already have revision, skipping fetch
# git checkout -q -f -B kisskb 07a361072378fb3ae116db86244372dbd68f9ea3
# git clean -qxdf
# < git log -1
# commit 07a361072378fb3ae116db86244372dbd68f9ea3
# Author: Daniel Henrique Barboza <danielhb413@gmail.com>
# Date:   Tue Mar 23 17:50:56 2021 -0300
# 
#     powerpc/pseries/hotplug-cpu: Show 'last online CPU' error in dlpar_cpu_offline()
#     
#     One of the reasons that dlpar_cpu_offline can fail is when attempting to
#     offline the last online CPU of the kernel. This can be observed in a
#     pseries QEMU guest that has hotplugged CPUs. If the user offlines all
#     other CPUs of the guest, and a hotplugged CPU is now the last online
#     CPU, trying to reclaim it will fail.
#     
#     The current error message in this situation returns rc with -EBUSY and a
#     generic explanation, e.g.:
#     
#       pseries-hotplug-cpu: Failed to offline CPU PowerPC,POWER9, rc: -16
#     
#     EBUSY can be caused by other conditions, such as cpu_hotplug_disable
#     being true. Throwing a more specific error message for this case,
#     instead of just "Failed to offline CPU", makes it clearer that the error
#     is in fact a known error situation instead of other generic/unknown
#     cause.
#     
#     This patch adds a 'last online' check in dlpar_cpu_offline() to catch
#     the 'last online CPU' offline error, eturning a more informative error
#     message:
#     
#       pseries-hotplug-cpu: Unable to remove last online CPU PowerPC,POWER9
#     
#     Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20210323205056.52768-2-danielhb413@gmail.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 07a361072378fb3ae116db86244372dbd68f9ea3
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  mpc86xx_defconfig
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/boot/dts/fsl/mvme7100.dts:135.22-137.4: Warning (pci_bridge): /pcie@f1008000: missing ranges for PCI bridge (or not a bridge)
  also defined at /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:92.7-117.3
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:102.9-116.4: Warning (pci_bridge): /pcie@f1008000/pcie@0: missing ranges for PCI bridge (or not a bridge)
/kisskb/src/arch/powerpc/boot/dts/fsl/mvme7100.dts:139.22-141.4: Warning (pci_bridge): /pcie@f1009000: missing ranges for PCI bridge (or not a bridge)
  also defined at /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:119.7-144.3
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:129.9-143.4: Warning (pci_bridge): /pcie@f1009000/pcie@0: missing ranges for PCI bridge (or not a bridge)
arch/powerpc/boot/dts/fsl/mvme7100.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge'
/kisskb/src/arch/powerpc/boot/dts/fsl/mvme7100.dts:30.11-32.6: Warning (i2c_bus_reg): /soc@f1000000/i2c@3000/rtc@68: missing or empty reg property
INFO: Uncompressed kernel (size 0xca633c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0xd00000)
Image Name:   Linux-5.12.0-rc3-g07a361072378
Created:      Sun Mar 28 02:51:25 2021
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    5678496 Bytes = 5545.41 KiB = 5.42 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5
# Build took: 0:02:17.318719