[LU-12323] save_stack_trace_tsk is not exported on arm architectures

Blocker — Thu, 20 Jun 2019 22:29:34 +0000

libcfs module needs save_stack_trace_tsk symbol:

nm libcfs.ko | grep save_stack_trace_tsk
                 U save_stack_trace_tsk

Added in 2.12 commit:

commit afedf9343686504c89f2e28cf6133540166f2347
Author: Yang Sheng <ys@whamcloud.com>
Date:   Wed Aug 8 00:24:19 2018 +0800

    LU-11062 libcfs: use save_stack_trace for stack dump

However, this symbol is not exported on arm architectures:

*hornc@cflosbld09 sle-cray $ grep save_stack_trace_tsk ./arch/arm{,64}/kernel/stacktrace.c | grep EXPORT
*hornc@cflosbld09 sle-cray $

In the above excerpt I'm checking the SLES 15 4.12.14-25.22 kernel. I'm not yet aware of any other kernels where arm architectures export this symbol.

Whamcloud Community JIRA

[LU-12323] save_stack_trace_tsk is not exported on arm architectures