David S. Miller 08280e6c4c sparc64: Like x86 we should check current->mm during perf backtrace generation.
If the MM is not active, only report the top-level PC.  Do not try to
access the address space.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-10-14 17:59:40 -07:00
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