diff options
| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2016-02-03 01:11:39 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-05 02:38:02 +0100 |
| commit | 96c4726f01cdbf53acf74cf2394e287d74bf40a3 (patch) | |
| tree | 65370c8647c10d1e32d14ba3ecb14db0bd875e50 /kernel/trace | |
| parent | 6d167a44e6c8da3316e037b788585fcf96112bea (diff) | |
cpufreq: powernv: Remove cpu_to_chip_id() from hot-path
cpu_to_chip_id() does a DT walk through to find out the chip id by
taking a contended device tree lock. This adds an unnecessary overhead
in a hot path. So instead of calling cpu_to_chip_id() everytime cache
the chip ids for all cores in the array 'core_to_chip_map' and use it
in the hotpath.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/trace')
0 files changed, 0 insertions, 0 deletions