Comment 1 for bug 1911376

The suggested code snippet is already in the current bionic master kernel tree (ubuntu kernel 4.15). See https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/bionic/tree/arch/arm64/kernel/cpufeature.c#n1256

The code snippet landed at the event of "Bionic update: upstream stable patchset 2019-11-08" LP:#1851876 by pulling two upstream commits[1], which should be released with bionic kernel version Ubuntu-4.15.0-71.80.

NEXT ACTION:
The working fix may be the other solution. Let's try to reproduce the issue on our site. @Fred, would you please elaborate how you enabled the SBSS function?

[1]
upstream commits 8f04e8e6e29c93421a95b61cad62e3918425eac7
(corresponding bionic-4.15 commit fd872fd82e12d765c4ae39a57ce2786c4e95c9a1 )

upstream commits d71be2b6c0e19180b5f80a6d42039cc074a693a2
(corresponding bionic-4.15 commit 2a3135c3033cd80a543d651f902fb7d4ebf0610c )