# git rev-parse -q --verify 887502826549caa7e4215fd9e628f48f14c0825a^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 887502826549caa7e4215fd9e628f48f14c0825a^{commit}
887502826549caa7e4215fd9e628f48f14c0825a
# git checkout -q -f -B kisskb 887502826549caa7e4215fd9e628f48f14c0825a
# git clean -qxdf
# < git log -1
# commit 887502826549caa7e4215fd9e628f48f14c0825a
# Author: Jason A. Donenfeld <Jason@zx2c4.com>
# Date:   Thu Jun 30 14:16:54 2022 +0200
# 
#     powerpc/powernv: delay rng platform device creation until later in boot
#     
#     The platform device for the rng must be created much later in boot.
#     Otherwise it tries to connect to a parent that doesn't yet exist,
#     resulting in this splat:
#     
#       [    0.000478] kobject: '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is being called.
#       [    0.002925] [c000000002a0fb30] [c00000000073b0bc] kobject_get+0x8c/0x100 (unreliable)
#       [    0.003071] [c000000002a0fba0] [c00000000087e464] device_add+0xf4/0xb00
#       [    0.003194] [c000000002a0fc80] [c000000000a7f6e4] of_device_add+0x64/0x80
#       [    0.003321] [c000000002a0fcb0] [c000000000a800d0] of_platform_device_create_pdata+0xd0/0x1b0
#       [    0.003476] [c000000002a0fd00] [c00000000201fa44] pnv_get_random_long_early+0x240/0x2e4
#       [    0.003623] [c000000002a0fe20] [c000000002060c38] random_init+0xc0/0x214
#     
#     This patch fixes the issue by doing the platform device creation inside
#     of machine_subsys_initcall.
#     
#     Fixes: f3eac426657d ("powerpc/powernv: wire up rng during setup_arch")
#     Cc: stable@vger.kernel.org
#     Reported-by: Sachin Sant <sachinp@linux.ibm.com>
#     Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
#     Tested-by: Sachin Sant <sachinp@linux.ibm.com>
#     [mpe: Change "of node" to "platform device" in change log]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20220630121654.1939181-1-Jason@zx2c4.com
# < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-gcc --version
# < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-ld --version
# < git log --format=%s --max-count=1 887502826549caa7e4215fd9e628f48f14c0825a
# < make -s -j 32 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze-gcc5 CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  mmu_defconfig
# < make -s -j 32 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze-gcc5 CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  help
# make -s -j 32 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze-gcc5 CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  olddefconfig
# make -s -j 32 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze-gcc5 CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  
Kernel: arch/microblaze/boot/linux.bin is ready  (#1)
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mmu_defconfig_microblaze-gcc5
# Build took: 0:01:00.183383