diff --git a/cmds/installd/commands.c b/cmds/installd/commands.c
index 76bc9d5..367f13a 100644
--- a/cmds/installd/commands.c
+++ b/cmds/installd/commands.c
@@ -712,6 +712,14 @@
     bool have_dex2oat_compiler_filter_flag = property_get("dalvik.vm.dex2oat-filter",
                                                           dex2oat_compiler_filter_flag, NULL) > 0;
 
+    char dex2oat_threads_buf[PROPERTY_VALUE_MAX];
+    bool have_dex2oat_threads_flag = property_get("dalvik.vm.dex2oat-threads", dex2oat_threads_buf,
+                                                  NULL) > 0;
+    char dex2oat_threads_arg[PROPERTY_VALUE_MAX + 2];
+    if (have_dex2oat_threads_flag) {
+        sprintf(dex2oat_threads_arg, "-j%s", dex2oat_threads_buf);
+    }
+
     char dex2oat_isa_features_key[PROPERTY_KEY_MAX];
     sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set);
     char dex2oat_isa_features[PROPERTY_VALUE_MAX];
@@ -803,6 +811,7 @@
                + (have_dex2oat_Xms_flag ? 2 : 0)
                + (have_dex2oat_Xmx_flag ? 2 : 0)
                + (have_dex2oat_compiler_filter_flag ? 1 : 0)
+               + (have_dex2oat_threads_flag ? 1 : 0)
                + (have_dex2oat_flags ? 1 : 0)
                + (have_dex2oat_swap_fd ? 1 : 0)];
     int i = 0;
@@ -835,6 +844,9 @@
     if (have_dex2oat_flags) {
         argv[i++] = dex2oat_flags;
     }
+    if (have_dex2oat_threads_flag) {
+        argv[i++] = dex2oat_threads_arg;
+    }
     if (have_dex2oat_swap_fd) {
         argv[i++] = dex2oat_swap_fd;
     }
diff --git a/include/input/Input.h b/include/input/Input.h
index 96b6885..c360f63 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -149,10 +149,22 @@
      * NOTE: If you want a flag to be able to set in a keylayout file, then you must add it to
      * InputEventLabels.h as well. */
 
+    // Indicates that the event should wake the device.
     POLICY_FLAG_WAKE = 0x00000001,
+
+    // Indicates that the key is virtual, such as a capacitive button, and should
+    // generate haptic feedback.  Virtual keys may be suppressed for some time
+    // after a recent touch to prevent accidental activation of virtual keys adjacent
+    // to the touch screen during an edge swipe.
     POLICY_FLAG_VIRTUAL = 0x00000002,
+
+    // Indicates that the key is the special function modifier.
     POLICY_FLAG_FUNCTION = 0x00000004,
 
+    // Indicates that the key represents a special gesture that has been detected by
+    // the touch firmware or driver.  Causes touch events from the same device to be canceled.
+    POLICY_FLAG_GESTURE = 0x00000008,
+
     POLICY_FLAG_RAW_MASK = 0x0000ffff,
 
     /* These flags are set by the input dispatcher. */
diff --git a/include/input/InputEventLabels.h b/include/input/InputEventLabels.h
index df50237..9aa7425 100644
--- a/include/input/InputEventLabels.h
+++ b/include/input/InputEventLabels.h
@@ -376,6 +376,7 @@
 static const InputEventLabel FLAGS[] = {
     DEFINE_FLAG(VIRTUAL),
     DEFINE_FLAG(FUNCTION),
+    DEFINE_FLAG(GESTURE),
 
     { NULL, 0 }
 };
diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp
index b4291bb..41a45fc 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/gui/Sensor.cpp
@@ -204,6 +204,13 @@
             mFlags |= SENSOR_FLAG_WAKE_UP;
         }
         break;
+    case SENSOR_TYPE_WRIST_TILT_GESTURE:
+        mStringType = SENSOR_STRING_TYPE_WRIST_TILT_GESTURE;
+        mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
+        if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
+            mFlags |= SENSOR_FLAG_WAKE_UP;
+        }
+        break;
     default:
         // Only pipe the stringType, requiredPermission and flags for custom sensors.
         if (halVersion > SENSORS_DEVICE_API_VERSION_1_0 && hwSensor->stringType) {
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 8634e42..ccf8ced 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -1078,6 +1078,14 @@
     }
 }
 
+void InputDevice::cancelTouch(nsecs_t when) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->cancelTouch(when);
+    }
+}
+
 int32_t InputDevice::getMetaState() {
     int32_t result = 0;
     size_t numMappers = mMappers.size();
@@ -1786,6 +1794,9 @@
 void InputMapper::cancelVibrate(int32_t token) {
 }
 
+void InputMapper::cancelTouch(nsecs_t when) {
+}
+
 int32_t InputMapper::getMetaState() {
     return 0;
 }
@@ -2134,6 +2145,9 @@
                             getDevice(), keyCode, scanCode)) {
                 return;
             }
+            if (policyFlags & POLICY_FLAG_GESTURE) {
+                mDevice->cancelTouch(when);
+            }
 
             mKeyDowns.push();
             KeyDown& keyDown = mKeyDowns.editTop();
@@ -5717,6 +5731,10 @@
     }
 }
 
+void TouchInputMapper::cancelTouch(nsecs_t when) {
+    abortPointerUsage(when, 0 /*policyFlags*/);
+}
+
 bool TouchInputMapper::isPointInsideSurface(int32_t x, int32_t y) {
     return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue
             && y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue;
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index c5896d4..34f20af 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -572,6 +572,7 @@
             const int32_t* keyCodes, uint8_t* outFlags);
     void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat, int32_t token);
     void cancelVibrate(int32_t token);
+    void cancelTouch(nsecs_t when);
 
     int32_t getMetaState();
 
@@ -973,6 +974,7 @@
     virtual void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
             int32_t token);
     virtual void cancelVibrate(int32_t token);
+    virtual void cancelTouch(nsecs_t when);
 
     virtual int32_t getMetaState();
 
@@ -1191,6 +1193,7 @@
             const int32_t* keyCodes, uint8_t* outFlags);
 
     virtual void fadePointer();
+    virtual void cancelTouch(nsecs_t when);
     virtual void timeoutExpired(nsecs_t when);
 
 protected: