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| author | Dustin Brown <dustinb@codeaurora.org> | 2017-06-13 13:54:38 -0700 |
|---|---|---|
| committer | Dustin Brown <dustinb@codeaurora.org> | 2017-06-22 12:40:54 -0700 |
| commit | 86922e80079a788fc4d0835e192cdde4f027e246 (patch) | |
| tree | d06fec46786dc46f28c86064adc622a409cb6682 /arch/arm/kernel/stacktrace.c | |
| parent | c0f69934303141559398f571e9263ffe2136fd84 (diff) | |
arm/arm64: Export save_stack_trace_tsk()
The kernel watchdog is a great debugging tool for finding tasks that
consume a disproportionate amount of CPU time in contiguous chunks. One
can imagine building a similar watchdog for arbitrary driver threads
using save_stack_trace_tsk() and print_stack_trace(). However, this is
not viable for dynamically loaded driver modules on ARM platforms
because save_stack_trace_tsk() is not exported for those architectures.
Export save_stack_trace_tsk() for the ARM64 architecture to align with
x86 and support various debugging use cases such as arbitrary driver
thread watchdog timers.
Change-Id: I61e9d2afc4703a786fa6dcaf82fe46c0ed250045
CRs-Fixed: 2061326
Signed-off-by: Dustin Brown <dustinb@codeaurora.org>
Diffstat (limited to 'arch/arm/kernel/stacktrace.c')
| -rw-r--r-- | arch/arm/kernel/stacktrace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c index 5964c77c593d..a1898c6092d1 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -175,6 +175,7 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) { __save_stack_trace(tsk, trace, 1); } +EXPORT_SYMBOL(save_stack_trace_tsk); void save_stack_trace(struct stack_trace *trace) { |