tree 1bcf54fbe3fe39b6941f898a6927b6ac14df9996
parent 869599ceda4a035cdb3345c563b74cdeef10f790
author Frederic Weisbecker <fweisbec@gmail.com> 1278561977 +0200
committer Frederic Weisbecker <fweisbec@gmail.com> 1278562815 +0200

perf: Resurrect flat callchains

Initialize the callchain radix tree root correctly.

When we walk through the parents, we must stop after the root, but
since it wasn't well initialized, its parent pointer was random.

Also the number of hits was random because uninitialized, hence it
was part of the callchain while the root doesn't contain anything.

This fixes segfaults and percentages followed by empty callchains
while running:

	perf report -g flat

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: 2.6.31.x-2.6.34.x <stable@kernel.org>