Merge android-4.4@a8935c9 (v4.4.87) into msm-4.4

* refs/heads/tmp-a8935c9:
  Linux 4.4.87
  crypto: algif_skcipher - only call put_page on referenced and used pages
  epoll: fix race between ep_poll_callback(POLLFREE) and ep_free()/ep_remove()
  kvm: arm/arm64: Force reading uncached stage2 PGD
  kvm: arm/arm64: Fix race in resetting stage2 PGD
  drm/ttm: Fix accounting error when fail to get pages for pool
  xfrm: policy: check policy direction value
  wl1251: add a missing spin_lock_init()
  CIFS: remove endian related sparse warning
  CIFS: Fix maximum SMB2 header size
  alpha: uapi: Add support for __SANE_USERSPACE_TYPES__
  cpuset: Fix incorrect memory_pressure control file mapping
  cpumask: fix spurious cpumask_of_node() on non-NUMA multi-node configs
  ceph: fix readpage from fscache
  i2c: ismt: Return EMSGSIZE for block reads with bogus length
  i2c: ismt: Don't duplicate the receive length for block reads
  irqchip: mips-gic: SYNC after enabling GIC region
  ANDROID: cpufreq-dt: Set sane defaults for schedutil rate limits
  BACKPORT: cpufreq: schedutil: Use policy-dependent transition delays
  FROMLIST: binder: fix an ret value override
  FROMLIST: binder: fix memory corruption in binder_transaction binder
  Linux 4.4.86
  drm/i915: fix compiler warning in drivers/gpu/drm/i915/intel_uncore.c
  scsi: sg: reset 'res_in_use' after unlinking reserved array
  scsi: sg: protect accesses to 'reserved' page array
  arm64: fpsimd: Prevent registers leaking across exec
  x86/io: Add "memory" clobber to insb/insw/insl/outsb/outsw/outsl
  arm64: mm: abort uaccess retries upon fatal signal
  lpfc: Fix Device discovery failures during switch reboot test.
  p54: memset(0) whole array
  lightnvm: initialize ppa_addr in dev_to_generic_addr()
  gcov: support GCC 7.1
  gcov: add support for gcc version >= 6
  i2c: jz4780: drop superfluous init
  btrfs: remove duplicate const specifier
  ALSA: au88x0: Fix zero clear of stream->resources
  scsi: isci: avoid array subscript warning
  sched: WALT: fix window mis-alignment
  sched: EAS: kill incorrect nohz idle cpu kick
  sched: EAS: fix incorrect energy delta calculation due to rounding error
  sched: EAS/WALT: take into account of waking task's load
  cpufreq: sched: WALT: don't apply capacity margin twice
  sched: WALT: fix potential overflow
  sched: EAS: schedfreq: fix CPU util over estimation
  sched: EAS/WALT: use cr_avg instead of prev_runnable_sum
  sched: WALT: fix broken cumulative runnable average accounting
  sched: deadline: WALT: account cumulative runnable avg
  FROMLIST: android: binder: Add page usage in binder stats
  FROMLIST: android: binder: Add shrinker tracepoints
  FROMLIST: android: binder: Add global lru shrinker to binder
  FROMLIST: android: binder: Move buffer out of area shared with user space
  FROMLIST: android: binder: Add allocator selftest
  FROMLIST: android: binder: Refactor prev and next buffer into a helper function
  android: android-base.config: enable IP6_NF_MATCH_RPFILTER
  UPSTREAM: cpufreq: schedutil: Use unsigned int for iowait boost
  UPSTREAM: cpufreq: schedutil: Make iowait boost more energy efficient

Conflicts:
	drivers/cpufreq/cpufreq-dt.c
	kernel/sched/deadline.c
	kernel/sched/fair.c
	kernel/sched/sched.h

Change-Id: Iee31db3fd1a0d1650ebf3d6de307a4e4637120b4
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>

1 files changed, 47 insertions, 15 deletions

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index e12309c1b07b..b90f7434e13b 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -64,8 +64,9 @@ struct sugov_cpu {
 	struct update_util_data update_util;
 	struct sugov_policy *sg_policy;
 
-	unsigned long iowait_boost;
-	unsigned long iowait_boost_max;
+	bool iowait_boost_pending;
+	unsigned int iowait_boost;
+	unsigned int iowait_boost_max;
 	u64 last_update;
 
 	/* The fields below are only needed when sharing a policy. */
@@ -224,30 +225,54 @@ static void sugov_set_iowait_boost(struct sugov_cpu *sg_cpu, u64 time,
 				   unsigned int flags)
 {
 	if (flags & SCHED_CPUFREQ_IOWAIT) {
-		sg_cpu->iowait_boost = sg_cpu->iowait_boost_max;
+		if (sg_cpu->iowait_boost_pending)
+			return;
+
+		sg_cpu->iowait_boost_pending = true;
+
+		if (sg_cpu->iowait_boost) {
+			sg_cpu->iowait_boost <<= 1;
+			if (sg_cpu->iowait_boost > sg_cpu->iowait_boost_max)
+				sg_cpu->iowait_boost = sg_cpu->iowait_boost_max;
+		} else {
+			sg_cpu->iowait_boost = sg_cpu->sg_policy->policy->min;
+		}
 	} else if (sg_cpu->iowait_boost) {
 		s64 delta_ns = time - sg_cpu->last_update;
 
 		/* Clear iowait_boost if the CPU apprears to have been idle. */
-		if (delta_ns > TICK_NSEC)
+		if (delta_ns > TICK_NSEC) {
 			sg_cpu->iowait_boost = 0;
+			sg_cpu->iowait_boost_pending = false;
+		}
 	}
 }
 
 static void sugov_iowait_boost(struct sugov_cpu *sg_cpu, unsigned long *util,
 			       unsigned long *max)
 {
-	unsigned long boost_util = sg_cpu->iowait_boost;
-	unsigned long boost_max = sg_cpu->iowait_boost_max;
+	unsigned int boost_util, boost_max;
 
-	if (!boost_util)
+	if (!sg_cpu->iowait_boost)
 		return;
 
+	if (sg_cpu->iowait_boost_pending) {
+		sg_cpu->iowait_boost_pending = false;
+	} else {
+		sg_cpu->iowait_boost >>= 1;
+		if (sg_cpu->iowait_boost < sg_cpu->sg_policy->policy->min) {
+			sg_cpu->iowait_boost = 0;
+			return;
+		}
+	}
+
+	boost_util = sg_cpu->iowait_boost;
+	boost_max = sg_cpu->iowait_boost_max;
+
 	if (*util * boost_max < *max * boost_util) {
 		*util = boost_util;
 		*max = boost_max;
 	}
-	sg_cpu->iowait_boost >>= 1;
 }
 
 #ifdef CONFIG_NO_HZ_COMMON
@@ -320,6 +345,7 @@ static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu)
 		delta_ns = last_freq_update_time - j_sg_cpu->last_update;
 		if (delta_ns > TICK_NSEC) {
 			j_sg_cpu->iowait_boost = 0;
+			j_sg_cpu->iowait_boost_pending = false;
 			continue;
 		}
 		if (j_sg_cpu->flags & SCHED_CPUFREQ_DL)
@@ -589,7 +615,6 @@ static int sugov_init(struct cpufreq_policy *policy)
 {
 	struct sugov_policy *sg_policy;
 	struct sugov_tunables *tunables;
-	unsigned int lat;
 	int ret = 0;
 
 	/* State should be equivalent to EXIT */
@@ -628,12 +653,19 @@ static int sugov_init(struct cpufreq_policy *policy)
 		goto stop_kthread;
 	}
 
-	tunables->up_rate_limit_us = LATENCY_MULTIPLIER;
-	tunables->down_rate_limit_us = LATENCY_MULTIPLIER;
-	lat = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
-	if (lat) {
-		tunables->up_rate_limit_us *= lat;
-		tunables->down_rate_limit_us *= lat;
+	if (policy->up_transition_delay_us && policy->down_transition_delay_us) {
+		tunables->up_rate_limit_us = policy->up_transition_delay_us;
+		tunables->down_rate_limit_us = policy->down_transition_delay_us;
+	} else {
+		unsigned int lat;
+
+                tunables->up_rate_limit_us = LATENCY_MULTIPLIER;
+                tunables->down_rate_limit_us = LATENCY_MULTIPLIER;
+		lat = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
+		if (lat) {
+                        tunables->up_rate_limit_us *= lat;
+                        tunables->down_rate_limit_us *= lat;
+                }
 	}
 
 	policy->governor_data = sg_policy;