add patch that temporarily fixes performance

kernel/0002-drop-baytrail-setpoint-to-90-temporary-hack-for-BKO-.patch

@@ -0,0 +1,34 @@
+From aea843d9bb47c160ee1e793c89a3824555ba5b44 Mon Sep 17 00:00:00 2001
+From: Adam Williamson <awilliam@redhat.com>
+Date: Fri, 21 Feb 2014 11:46:37 -0800
+Subject: [PATCH 2/2] drop baytrail setpoint to 90: temporary hack for BKO
+ #70941
+
+Since RC2 there's a pstate bug which makes performance very poor with the
+default 'powersave' governor. Dirk Brandewie is working on a fix and says
+dropping setpoint to 90 should work around it for now. The commit that
+introduced the bug fixes another significant bug - BKO #66581 - so using
+this workaround seems a better idea than reverting that commit.
+
+This is only intended as a temporary workaround for my 'awb' kernels, it is
+not for upstreaming in any way.
+---
+ drivers/cpufreq/intel_pstate.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
+index 79606f4..c8c3631 100644
+--- a/drivers/cpufreq/intel_pstate.c
++++ b/drivers/cpufreq/intel_pstate.c
+@@ -463,7 +463,7 @@ static struct cpu_defaults byt_params = {
+ 	.pid_policy = {
+ 		.sample_rate_ms = 10,
+ 		.deadband = 0,
+-		.setpoint = 97,
++		.setpoint = 90,
+ 		.p_gain_pct = 14,
+ 		.d_gain_pct = 0,
+ 		.i_gain_pct = 4,
+-- 
+1.9.0
+

kernel/MANIFEST

@@ -16,3 +16,8 @@ tsc-add-baytrail.patch
 * https://bugzilla.kernel.org/show_bug.cgi?id=70931
 0001-reboot-quirks-on-Baytrail-tablets-Dell-Venue-8-Pro-L.patch
 dv8p-poweroff.patch
+
+* Work around a bug that causes very bad performance on default 'powersave'
+* governor until it's fixed upstream
+* https://bugzilla.kernel.org/show_bug.cgi?id=70941
+0002-drop-baytrail-setpoint-to-90-temporary-hack-for-BKO-.patch