powerpc/perf/24x7: use rb_entry

To make the code clearer, use rb_entry() instead of container_of() to
deal with rbtree.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Geliang Tang 2016-12-20 22:02:17 +08:00 • committed by Michael Ellerman
commit c197922f0a