ARM64: smp: implement arch_trigger_all_cpus_backtrace using IPI
Since ARM64 doesn't have an NMI, send an IPI to all other CPUs
(current cpu prints the stack directly) to capture a backtrace.
Change-Id: Ib90494123205b3bbaa0b244ccde6c7e40a560199
Signed-off-by:
Rohit Vaswani <rvaswani@codeaurora.org>
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