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| author | Dustin Brown <dustinb@codeaurora.org> | 2017-08-07 19:44:01 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-09-09 16:26:42 +0100 |
| commit | 9a3dc3186fc3795e076a4122da9e0258651a9631 (patch) | |
| tree | 572634c72d926358822b797c9227fcbead9ae812 /arch | |
| parent | 494609701e06a0040c0f4042c80fac4e8b5f0ab8 (diff) | |
| download | op-kernel-dev-9a3dc3186fc3795e076a4122da9e0258651a9631.zip op-kernel-dev-9a3dc3186fc3795e076a4122da9e0258651a9631.tar.gz | |
ARM: 8691/1: 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 ARM architecture to align with
x86 and support various debugging use cases such as arbitrary driver
thread watchdog timers.
Signed-off-by: Dustin Brown <dustinb@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch')
| -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 3a2fa20..65228bf4 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -171,6 +171,7 @@ 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) { |
