# git gc
# git rev-parse -q --verify 10f78fd0dabbc3856ddd67b09a46abdedb045913^{commit}
10f78fd0dabbc3856ddd67b09a46abdedb045913
already have revision, skipping fetch
# git checkout -q -f -B kisskb 10f78fd0dabbc3856ddd67b09a46abdedb045913
# git clean -qxdf
# < git log -1
# commit 10f78fd0dabbc3856ddd67b09a46abdedb045913
# Author: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
# Date:   Fri Nov 27 11:07:38 2020 +0530
# 
#     powerpc/numa: Fix a regression on memoryless node 0
#     
#     Commit e75130f20b1f ("powerpc/numa: Offline memoryless cpuless node 0")
#     offlines node 0 and expects nodes to be subsequently onlined when CPUs
#     or nodes are detected.
#     
#     Commit 6398eaa26816 ("powerpc/numa: Prefer node id queried from vphn")
#     skips onlining node 0 when CPUs are associated with node 0.
#     
#     On systems with node 0 having CPUs but no memory, this causes node 0 be
#     marked offline. This causes issues at boot time when trying to set
#     memory node for online CPUs while building the zonelist.
#     
#     0:mon> t
#     [link register   ] c000000000400354 __build_all_zonelists+0x164/0x280
#     [c00000000161bda0] c0000000016533c8 node_states+0x20/0xa0 (unreliable)
#     [c00000000161bdc0] c000000000400384 __build_all_zonelists+0x194/0x280
#     [c00000000161be30] c000000001041800 build_all_zonelists_init+0x4c/0x118
#     [c00000000161be80] c0000000004020d0 build_all_zonelists+0x190/0x1b0
#     [c00000000161bef0] c000000001003cf8 start_kernel+0x18c/0x6a8
#     [c00000000161bf90] c00000000000adb4 start_here_common+0x1c/0x3e8
#     0:mon> r
#     R00 = c000000000400354   R16 = 000000000b57a0e8
#     R01 = c00000000161bda0   R17 = 000000000b57a6b0
#     R02 = c00000000161ce00   R18 = 000000000b5afee8
#     R03 = 0000000000000000   R19 = 000000000b6448a0
#     R04 = 0000000000000000   R20 = fffffffffffffffd
#     R05 = 0000000000000000   R21 = 0000000001400000
#     R06 = 0000000000000000   R22 = 000000001ec00000
#     R07 = 0000000000000001   R23 = c000000001175580
#     R08 = 0000000000000000   R24 = c000000001651ed8
#     R09 = c0000000017e84d8   R25 = c000000001652480
#     R10 = 0000000000000000   R26 = c000000001175584
#     R11 = c000000c7fac0d10   R27 = c0000000019568d0
#     R12 = c000000000400180   R28 = 0000000000000000
#     R13 = c000000002200000   R29 = c00000000164dd78
#     R14 = 000000000b579f78   R30 = 0000000000000000
#     R15 = 000000000b57a2b8   R31 = c000000001175584
#     pc  = c000000000400194 local_memory_node+0x24/0x80
#     cfar= c000000000074334 mcount+0xc/0x10
#     lr  = c000000000400354 __build_all_zonelists+0x164/0x280
#     msr = 8000000002001033   cr  = 44002284
#     ctr = c000000000400180   xer = 0000000000000001   trap =  380
#     dar = 0000000000001388   dsisr = c00000000161bc90
#     0:mon>
#     
#     Fix this by setting node to be online while onlining CPUs that belong to
#     node 0.
#     
#     Fixes: e75130f20b1f ("powerpc/numa: Offline memoryless cpuless node 0")
#     Fixes: 6398eaa26816 ("powerpc/numa: Prefer node id queried from vphn")
#     Reported-by: Milan Mohanty <milmohan@in.ibm.com>
#     Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20201127053738.10085-1-srikar@linux.vnet.ibm.com
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 10f78fd0dabbc3856ddd67b09a46abdedb045913
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_klondike_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/klondike_defconfig
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_klondike_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_klondike_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_klondike_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/block/genhd.c: In function 'diskstats_show':
/kisskb/src/block/genhd.c:1659:1: warning: the frame size of 1160 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_klondike_defconfig_powerpc-gcc4.9
# Build took: 0:05:03.230195