Comment 5 for bug 1827755

------- Comment From <email address hidden> 2019-05-20 15:09 EDT-------
I tried that kernel out and it works:
root@ltc-boston25:/home/ubuntu/comp_selftest# cat /proc/version
Linux version 4.15.0-51-generic (buildd@bos02-ppc64el-003) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04)) #55~lp1827755+build.1-Ubuntu SMP Fri May 17 18:53:29 UTC 2019
root@ltc-boston25:/home/ubuntu/comp_selftest# insmod comp_selftest.ko
root@ltc-boston25:/home/ubuntu/comp_selftest# ./testit
root@ltc-boston25:/home/ubuntu/comp_selftest# dmesg |tail
<snip>
[ 354.958178] comp_selftest: loading out-of-tree module taints kernel.
[ 354.958396] comp_selftest: module verification failed: signature and/or required key missing - tainting kernel
[ 361.124620] compression self test starting
[ 361.124623] compressor: 842-nx
[ 361.124624] repeat: Y
[ 361.124625] threads: 16
[ 361.124627] offsets 0-0/1, 0-0/1, 0-0/1
[ 361.124630] lengths 10000-10000/1, 10000-10000/1, 10000-10000/1
root@ltc-boston25:/home/ubuntu/comp_selftest# cat /sys/kernel/debug/comp_selftest/status
^Creads 16 MBps: 45192/39510 peak 45509/43884 off 0/0/0 len 10000/10000/10000
root@ltc-boston25:/home/ubuntu/comp_selftest#

Where comp_selftest is the comp_selftest.c/README located here:
https://github.com/sukadev/linux/tree/ee0c8b0c3dcb8856c5998ac21e01916ea430f687/crypto/comp_selftest
and testit is just a copy/paste from the README of the commands to get the test running (up to status).