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author | Dustin Brown <dustinb@codeaurora.org> | 2017-08-07 20:44:01 +0200 |
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committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-09-09 17:26:42 +0200 |
commit | 9a3dc3186fc3795e076a4122da9e0258651a9631 (patch) | |
tree | 572634c72d926358822b797c9227fcbead9ae812 /arch | |
parent | ARM: always enable AEABI for ARMv6+ (diff) | |
download | linux-9a3dc3186fc3795e076a4122da9e0258651a9631.tar.xz linux-9a3dc3186fc3795e076a4122da9e0258651a9631.zip |
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 3a2fa203637a..65228bf4c6df 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) { |