perf report broken for branch stack samples

[Andi Kleen]

On Wed, Apr 01, 2015 at 02:32:54PM +0530, Anshuman Khandual wrote:
> Hello,
> 
> perf report is not showing up the branch stack sample results in the
> from_symbol ---> to_symbol format even if the perf.data file has got
> the samples (through 'perf record -b <workload>' session). Perf report

Sorry for the late answer. This was already fixed in tip by 

commit fefd2d9619de3bf0bf02a8622e9f445c3d19cc3f
Author: He Kuang <hekuang at huawei.com>
Date:   Sun Feb 15 10:33:37 2015 +0800

    perf report: Fix branch stack mode cannot be set

-Andi