Guo Ren 48ede51fd9 csky: Fixup add zero_fp fixup perf backtrace panic ...

We need set fp zero to let backtrace know the end. The patch fixup perf
callchain panic problem, because backtrace didn't know what is the end
of fp.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Mao Han <han_mao@c-sky.com>

2019-09-30 10:26:32 +08:00

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