tree 0ca61313d9c74d66019a7a90306653464de091e2
parent ddffeb8c4d0331609ef2581d84de4d763607bd37
author David S. Miller <davem@davemloft.net> 1350262780 -0700
committer David S. Miller <davem@davemloft.net> 1350262780 -0700

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>