# git rev-parse -q --verify b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40^{commit}
b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40
already have revision, skipping fetch
# git checkout -q -f -B kisskb b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40
# git clean -qxdf
# < git log -1
# commit b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40
# Author: Nathan Fontenot <nfont@linux.vnet.ibm.com>
# Date:   Tue Oct 2 10:35:59 2018 -0500
# 
#     powerpc/pseries: Track LMB nid instead of using device tree
#     
#     When removing memory we need to remove the memory from the node
#     it was added to instead of looking up the node it should be in
#     in the device tree.
#     
#     During testing we have seen scenarios where the affinity for a
#     LMB changes due to a partition migration or PRRN event. In these
#     cases the node the LMB exists in may not match the node the device
#     tree indicates it belongs in. This can lead to a system crash
#     when trying to DLPAR remove the LMB after a migration or PRRN
#     event. The current code looks up the node in the device tree to
#     remove the LMB from, the crash occurs when we try to offline this
#     node and it does not have any data, i.e. node_data[nid] == NULL.
#     
#     36:mon> e
#     cpu 0x36: Vector: 300 (Data Access) at [c0000001828b7810]
#         pc: c00000000036d08c: try_offline_node+0x2c/0x1b0
#         lr: c0000000003a14ec: remove_memory+0xbc/0x110
#         sp: c0000001828b7a90
#        msr: 800000000280b033
#        dar: 9a28
#      dsisr: 40000000
#       current = 0xc0000006329c4c80
#       paca    = 0xc000000007a55200   softe: 0        irq_happened: 0x01
#         pid   = 76926, comm = kworker/u320:3
#     
#     36:mon> t
#     [link register   ] c0000000003a14ec remove_memory+0xbc/0x110
#     [c0000001828b7a90] c00000000006a1cc arch_remove_memory+0x9c/0xd0 (unreliable)
#     [c0000001828b7ad0] c0000000003a14e0 remove_memory+0xb0/0x110
#     [c0000001828b7b20] c0000000000c7db4 dlpar_remove_lmb+0x94/0x160
#     [c0000001828b7b60] c0000000000c8ef8 dlpar_memory+0x7e8/0xd10
#     [c0000001828b7bf0] c0000000000bf828 handle_dlpar_errorlog+0xf8/0x160
#     [c0000001828b7c60] c0000000000bf8cc pseries_hp_work_fn+0x3c/0xa0
#     [c0000001828b7c90] c000000000128cd8 process_one_work+0x298/0x5a0
#     [c0000001828b7d20] c000000000129068 worker_thread+0x88/0x620
#     [c0000001828b7dc0] c00000000013223c kthread+0x1ac/0x1c0
#     [c0000001828b7e30] c00000000000b45c ret_from_kernel_thread+0x5c/0x80
#     
#     To resolve this we need to track the node a LMB belongs to when
#     it is added to the system so we can remove it from that node instead
#     of the node that the device tree indicates it should belong to.
#     
#     Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 b2d3b5ee66f2a04a918cc043cec0c9ed3de58f40
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_obs600_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  40x/obs600_defconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_obs600_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
<stdin>:1478:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
<stdin>:1481:2: warning: #warning syscall io_uring_setup not implemented [-Wcpp]
<stdin>:1484:2: warning: #warning syscall io_uring_enter not implemented [-Wcpp]
<stdin>:1487:2: warning: #warning syscall io_uring_register not implemented [-Wcpp]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:187:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:337:21: note: 'pdeo' was declared here
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2594:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write':
/kisskb/src/drivers/base/regmap/regmap.c:1855:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here
/kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery':
/kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
INFO: Uncompressed kernel (size 0x4bfa4c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-5.1.0-rc3-gb2d3b5ee66f2
Created:      Tue Apr 30 01:39:56 2019
Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
Data Size:    2416098 Bytes = 2359.47 KiB = 2.30 MiB
Load Address: 00000000
Entry Point:  00000000
Contents:
   Image 0: 2409211 Bytes = 2352.75 KiB = 2.30 MiB
   Image 1: 3 Bytes = 0.00 KiB = 0.00 MiB
   Image 2: 6866 Bytes = 6.71 KiB = 0.01 MiB
Completed OK
# rm -rf /kisskb/build/powerpc-next_40x_obs600_defconfig_powerpc-gcc4.6
# Build took: 0:00:20.926486