# git rev-parse -q --verify e610a466d16a086e321f0bd421e2fc75cff28605^{commit}
e610a466d16a086e321f0bd421e2fc75cff28605
already have revision, skipping fetch
# git checkout -q -f -B kisskb e610a466d16a086e321f0bd421e2fc75cff28605
# git clean -qxdf
# < git log -1
# commit e610a466d16a086e321f0bd421e2fc75cff28605
# Author: Nathan Lynch <nathanl@linux.ibm.com>
# Date:   Tue Jun 11 23:45:06 2019 -0500
# 
#     powerpc/pseries/mobility: rebuild cacheinfo hierarchy post-migration
#     
#     It's common for the platform to replace the cache device nodes after a
#     migration. Since the cacheinfo code is never informed about this, it
#     never drops its references to the source system's cache nodes, causing
#     it to wind up in an inconsistent state resulting in warnings and oopses
#     as soon as CPU online/offline occurs after the migration, e.g.
#     
#       cache for /cpus/l3-cache@3113(Unified) refers to cache for /cpus/l2-cache@200d(Unified)
#       WARNING: CPU: 15 PID: 86 at arch/powerpc/kernel/cacheinfo.c:176 release_cache+0x1bc/0x1d0
#       [...]
#       NIP release_cache+0x1bc/0x1d0
#       LR  release_cache+0x1b8/0x1d0
#       Call Trace:
#         release_cache+0x1b8/0x1d0 (unreliable)
#         cacheinfo_cpu_offline+0x1c4/0x2c0
#         unregister_cpu_online+0x1b8/0x260
#         cpuhp_invoke_callback+0x114/0xf40
#         cpuhp_thread_fun+0x270/0x310
#         smpboot_thread_fn+0x2c8/0x390
#         kthread+0x1b8/0x1c0
#         ret_from_kernel_thread+0x5c/0x68
#     
#     Using device tree notifiers won't work since we want to rebuild the
#     hierarchy only after all the removals and additions have occurred and
#     the device tree is in a consistent state. Call cacheinfo_teardown()
#     before processing device tree updates, and rebuild the hierarchy
#     afterward.
#     
#     Fixes: 410bccf97881 ("powerpc/pseries: Partition migration in the kernel")
#     Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
#     Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version
# < git log --format=%s --max-count=1 e610a466d16a086e321f0bd421e2fc75cff28605
# < make -s -j 80 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# make -s -j 80 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  
FIT description: Linux 5.2.0-rc2-ge610a466d16a
Created:         Sat Jun 15 17:03:43 2019
 Image 0 (kernel@0)
  Description:  Linux 5.2.0-rc2-ge610a466d16a
  Created:      Sat Jun 15 17:03:43 2019
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    4650948 Bytes = 4541.94 KiB = 4.44 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x80896410
  Hash algo:    sha1
  Hash value:   3989fab691b5202a03019ad4e5d72beb3bb8ca81
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Sat Jun 15 17:03:43 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3793 Bytes = 3.70 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   4799f50d688573234da6e9d7701234d394759ef4
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Sat Jun 15 17:03:43 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 Image 3 (fdt@ocelot_pcb123)
  Description:  MSCC Ocelot PCB123 Device Tree
  Created:      Sat Jun 15 17:03:43 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    4603 Bytes = 4.50 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   33e429f316125d86bb863c2fe8d9c42fbcf90bfb
 Image 4 (fdt@ocelot_pcb120)
  Description:  MSCC Ocelot PCB120 Device Tree
  Created:      Sat Jun 15 17:03:43 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    5162 Bytes = 5.04 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   0c5db3f23ba8b80fafd8c8e4eacfcb8ad62a91ae
 Image 5 (fdt@xilfpga)
  Description:  MIPSfpga (xilfpga) Device Tree
  Created:      Sat Jun 15 17:03:43 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    2708 Bytes = 2.64 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   63d058b780f65e22da30f0a183433765f1807f1d
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
 Configuration 1 (conf@boston)
  Description:  Boston Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@boston
 Configuration 2 (conf@ni169445)
  Description:  NI 169445 Linux Kernel
  Kernel:       kernel@0
  FDT:          fdt@ni169445
 Configuration 3 (conf@ocelot_pcb123)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb123
 Configuration 4 (conf@ocelot_pcb120)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb120
 Configuration 5 (conf@xilfpga)
  Description:  MIPSfpga Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@xilfpga
Completed OK
# rm -rf /kisskb/build/powerpc-next_mips-defconfig_mipsel
# Build took: 0:01:50.043897