Linux kernel bug fix: tracing: Fix user stack trace "??" output
Subsystem: tracing (kernel/trace/trace_output.c)
Bug type: unknown, severity: unknown
Files changed: kernel/trace/trace_output.c
Introduced by Thomas Gleixner on 2019-04-14 19:58:32 +0200; fixed by Eiichi Tsukata on 2019-07-19 12:12:39 -0400 (lifetime: 95 days)