diff --git a/api/current.xml b/api/current.xml
index ed51bbf..bc8e077 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -93977,6 +93977,8 @@
 >
 <parameter name="uid" type="int">
 </parameter>
+<parameter name="ws" type="android.os.WorkSource">
+</parameter>
 </method>
 <method name="onDisable"
  return="void"
@@ -94106,6 +94108,8 @@
 >
 <parameter name="uid" type="int">
 </parameter>
+<parameter name="ws" type="android.os.WorkSource">
+</parameter>
 </method>
 <method name="onRequiresCell"
  return="boolean"
@@ -94167,6 +94171,8 @@
 >
 <parameter name="minTime" type="long">
 </parameter>
+<parameter name="ws" type="android.os.WorkSource">
+</parameter>
 </method>
 <method name="onSupportsAltitude"
  return="boolean"
@@ -111503,6 +111509,19 @@
 <parameter name="refCounted" type="boolean">
 </parameter>
 </method>
+<method name="setWorkSource"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="ws" type="android.os.WorkSource">
+</parameter>
+</method>
 </class>
 </package>
 <package name="android.opengl"
@@ -138355,6 +138374,19 @@
 <parameter name="value" type="boolean">
 </parameter>
 </method>
+<method name="setWorkSource"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="ws" type="android.os.WorkSource">
+</parameter>
+</method>
 </class>
 <class name="Process"
  extends="java.lang.Object"
@@ -139503,6 +139535,134 @@
 </parameter>
 </method>
 </class>
+<class name="WorkSource"
+ extends="java.lang.Object"
+ abstract="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<implements name="android.os.Parcelable">
+</implements>
+<constructor name="WorkSource"
+ type="android.os.WorkSource"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</constructor>
+<constructor name="WorkSource"
+ type="android.os.WorkSource"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="orig" type="android.os.WorkSource">
+</parameter>
+</constructor>
+<method name="add"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="other" type="android.os.WorkSource">
+</parameter>
+</method>
+<method name="clear"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
+<method name="describeContents"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
+<method name="diff"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="other" type="android.os.WorkSource">
+</parameter>
+</method>
+<method name="remove"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="other" type="android.os.WorkSource">
+</parameter>
+</method>
+<method name="set"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="other" type="android.os.WorkSource">
+</parameter>
+</method>
+<method name="writeToParcel"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="dest" type="android.os.Parcel">
+</parameter>
+<parameter name="flags" type="int">
+</parameter>
+</method>
+<field name="CREATOR"
+ type="android.os.Parcelable.Creator"
+ transient="false"
+ volatile="false"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+</class>
 </package>
 <package name="android.os.storage"
 >
diff --git a/cmds/svc/src/com/android/commands/svc/PowerCommand.java b/cmds/svc/src/com/android/commands/svc/PowerCommand.java
index d3ec3d9..e1d6619 100644
--- a/cmds/svc/src/com/android/commands/svc/PowerCommand.java
+++ b/cmds/svc/src/com/android/commands/svc/PowerCommand.java
@@ -64,7 +64,7 @@
                             = IPowerManager.Stub.asInterface(ServiceManager.getService(Context.POWER_SERVICE));
                     try {
                         IBinder lock = new Binder();
-                        pm.acquireWakeLock(PowerManager.FULL_WAKE_LOCK, lock, "svc power");
+                        pm.acquireWakeLock(PowerManager.FULL_WAKE_LOCK, lock, "svc power", null);
                         pm.setStayOnSetting(val);
                         pm.releaseWakeLock(lock, 0);
                     }
diff --git a/core/java/android/content/SyncManager.java b/core/java/android/content/SyncManager.java
index 7f749bb..fee31ea 100644
--- a/core/java/android/content/SyncManager.java
+++ b/core/java/android/content/SyncManager.java
@@ -47,6 +47,7 @@
 import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.SystemProperties;
+import android.os.WorkSource;
 import android.provider.Settings;
 import android.text.format.DateUtils;
 import android.text.format.Time;
@@ -129,8 +130,8 @@
 
     private static final int INITIALIZATION_UNBIND_DELAY_MS = 5000;
 
-    private static final String SYNC_WAKE_LOCK_PREFIX = "SyncWakeLock";
-    private static final String HANDLE_SYNC_ALARM_WAKE_LOCK = "SyncManagerHandleSyncAlarmWakeLock";
+    private static final String SYNC_WAKE_LOCK_PREFIX = "*sync*";
+    private static final String HANDLE_SYNC_ALARM_WAKE_LOCK = "SyncManagerHandleSyncAlarm";
 
     private Context mContext;
 
@@ -1713,6 +1714,7 @@
                 Log.v(TAG, "runStateIdle: setting mActiveSyncContext to " + mActiveSyncContext);
             }
             mSyncStorageEngine.setActiveSync(mActiveSyncContext);
+            mSyncWakeLock.setWorkSource(new WorkSource(syncAdapterInfo.uid));
             if (!activeSyncContext.bindToSyncAdapter(syncAdapterInfo)) {
                 Log.e(TAG, "Bind attempt failed to " + syncAdapterInfo);
                 mActiveSyncContext.close();
diff --git a/core/java/android/os/BatteryStats.java b/core/java/android/os/BatteryStats.java
index f5b1e57..f182a7a 100644
--- a/core/java/android/os/BatteryStats.java
+++ b/core/java/android/os/BatteryStats.java
@@ -404,6 +404,7 @@
         
         public static final byte CMD_UPDATE = 0;
         public static final byte CMD_START = 1;
+        public static final byte CMD_OVERFLOW = 2;
         
         public byte cmd;
         
@@ -1703,6 +1704,8 @@
                 pw.print(" ");
                 if (rec.cmd == HistoryItem.CMD_START) {
                     pw.println(" START");
+                } else if (rec.cmd == HistoryItem.CMD_OVERFLOW) {
+                    pw.println(" *OVERFLOW*");
                 } else {
                     if (rec.batteryLevel < 10) pw.print("00");
                     else if (rec.batteryLevel < 100) pw.print("0");
diff --git a/core/java/android/os/IPowerManager.aidl b/core/java/android/os/IPowerManager.aidl
index 01cc408..0067e940 100644
--- a/core/java/android/os/IPowerManager.aidl
+++ b/core/java/android/os/IPowerManager.aidl
@@ -17,10 +17,13 @@
 
 package android.os;
 
+import android.os.WorkSource;
+
 /** @hide */
 interface IPowerManager
 {
-    void acquireWakeLock(int flags, IBinder lock, String tag);
+    void acquireWakeLock(int flags, IBinder lock, String tag, in WorkSource ws);
+    void updateWakeLockWorkSource(IBinder lock, in WorkSource ws);
     void goToSleep(long time);
     void goToSleepWithReason(long time, int reason);
     void releaseWakeLock(IBinder lock, int flags);
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index f4ca8bc..3876a3e 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -209,6 +209,7 @@
         int mCount = 0;
         boolean mRefCounted = true;
         boolean mHeld = false;
+        WorkSource mWorkSource;
 
         WakeLock(int flags, String tag)
         {
@@ -247,7 +248,7 @@
             synchronized (mToken) {
                 if (!mRefCounted || mCount++ == 0) {
                     try {
-                        mService.acquireWakeLock(mFlags, mToken, mTag);
+                        mService.acquireWakeLock(mFlags, mToken, mTag, mWorkSource);
                     } catch (RemoteException e) {
                     }
                     mHeld = true;
@@ -313,6 +314,32 @@
             }
         }
 
+        public void setWorkSource(WorkSource ws) {
+            synchronized (mToken) {
+                if (ws != null && ws.size() == 0) {
+                    ws = null;
+                }
+                boolean changed = true;
+                if (ws == null) {
+                    mWorkSource = null;
+                } else if (mWorkSource == null) {
+                    changed = mWorkSource != null;
+                    mWorkSource = new WorkSource(ws);
+                } else {
+                    changed = mWorkSource.diff(ws);
+                    if (changed) {
+                        mWorkSource.set(ws);
+                    }
+                }
+                if (changed && mHeld) {
+                    try {
+                        mService.updateWakeLockWorkSource(mToken, mWorkSource);
+                    } catch (RemoteException e) {
+                    }
+                }
+            }
+        }
+
         public String toString() {
             synchronized (mToken) {
                 return "WakeLock{"
diff --git a/core/java/android/os/WorkSource.aidl b/core/java/android/os/WorkSource.aidl
new file mode 100644
index 0000000..1e7fabc
--- /dev/null
+++ b/core/java/android/os/WorkSource.aidl
@@ -0,0 +1,18 @@
+/* Copyright 2010, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+package android.os;
+
+parcelable WorkSource;
diff --git a/core/java/android/os/WorkSource.java b/core/java/android/os/WorkSource.java
new file mode 100644
index 0000000..bba1984
--- /dev/null
+++ b/core/java/android/os/WorkSource.java
@@ -0,0 +1,311 @@
+package android.os;
+
+/**
+ * Describes the source of some work that may be done by someone else.
+ * Currently the public representation of what a work source is is not
+ * defined; this is an opaque container.
+ */
+public class WorkSource implements Parcelable {
+    int mNum;
+    int[] mUids;
+
+    /**
+     * Internal statics to avoid object allocations in some operations.
+     * The WorkSource object itself is not thread safe, but we need to
+     * hold sTmpWorkSource lock while working with these statics.
+     */
+    static final WorkSource sTmpWorkSource = new WorkSource(0);
+    /**
+     * For returning newbie work from a modification operation.
+     */
+    static WorkSource sNewbWork;
+    /**
+     * For returning gone work form a modification operation.
+     */
+    static WorkSource sGoneWork;
+
+    /**
+     * Create an empty work source.
+     */
+    public WorkSource() {
+        mNum = 0;
+    }
+
+    /**
+     * Create a new WorkSource that is a copy of an existing one.
+     * If <var>orig</var> is null, an empty WorkSource is created.
+     */
+    public WorkSource(WorkSource orig) {
+        if (orig == null) {
+            mNum = 0;
+            return;
+        }
+        mNum = orig.mNum;
+        if (orig.mUids != null) {
+            mUids = orig.mUids.clone();
+        } else {
+            mUids = null;
+        }
+    }
+
+    /** @hide */
+    public WorkSource(int uid) {
+        mNum = 1;
+        mUids = new int[] { uid, 0 };
+    }
+
+    WorkSource(Parcel in) {
+        mNum = in.readInt();
+        mUids = in.createIntArray();
+    }
+
+    /** @hide */
+    public int size() {
+        return mNum;
+    }
+
+    /** @hide */
+    public int get(int index) {
+        return mUids[index];
+    }
+
+    /**
+     * Clear this WorkSource to be empty.
+     */
+    public void clear() {
+        mNum = 0;
+    }
+
+    /**
+     * Compare this WorkSource with another.
+     * @param other The WorkSource to compare against.
+     * @return If there is a difference, true is returned.
+     */
+    public boolean diff(WorkSource other) {
+        int N = mNum;
+        if (N != other.mNum) {
+            return true;
+        }
+        final int[] uids1 = mUids;
+        final int[] uids2 = other.mUids;
+        for (int i=0; i<N; i++) {
+            if (uids1[i] != uids2[i]) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Replace the current contents of this work source with the given
+     * work source.  If <var>other</var> is null, the current work source
+     * will be made empty.
+     */
+    public void set(WorkSource other) {
+        if (other == null) {
+            mNum = 0;
+            return;
+        }
+        mNum = other.mNum;
+        if (other.mUids != null) {
+            if (mUids != null && mUids.length >= mNum) {
+                System.arraycopy(other.mUids, 0, mUids, 0, mNum);
+            } else {
+                mUids = other.mUids.clone();
+            }
+        } else {
+            mUids = null;
+        }
+    }
+
+    /** @hide */
+    public void set(int uid) {
+        mNum = 1;
+        if (mUids == null) mUids = new int[2];
+        mUids[0] = uid;
+    }
+
+    /** @hide */
+    public WorkSource[] setReturningDiffs(WorkSource other) {
+        synchronized (sTmpWorkSource) {
+            sNewbWork = null;
+            sGoneWork = null;
+            updateLocked(other, true, true);
+            if (sNewbWork != null || sGoneWork != null) {
+                WorkSource[] diffs = new WorkSource[2];
+                diffs[0] = sNewbWork;
+                diffs[1] = sGoneWork;
+                return diffs;
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Merge the contents of <var>other</var> WorkSource in to this one.
+     *
+     * @param other The other WorkSource whose contents are to be merged.
+     * @return Returns true if any new sources were added.
+     */
+    public boolean add(WorkSource other) {
+        synchronized (sTmpWorkSource) {
+            return updateLocked(other, false, false);
+        }
+    }
+
+    /** @hide */
+    public WorkSource addReturningNewbs(WorkSource other) {
+        synchronized (sTmpWorkSource) {
+            sNewbWork = null;
+            updateLocked(other, false, true);
+            return sNewbWork;
+        }
+    }
+
+    /** @hide */
+    public boolean add(int uid) {
+        synchronized (sTmpWorkSource) {
+            sTmpWorkSource.mUids[0] = uid;
+            return updateLocked(sTmpWorkSource, false, false);
+        }
+    }
+
+    /** @hide */
+    public WorkSource addReturningNewbs(int uid) {
+        synchronized (sTmpWorkSource) {
+            sNewbWork = null;
+            sTmpWorkSource.mUids[0] = uid;
+            updateLocked(sTmpWorkSource, false, true);
+            return sNewbWork;
+        }
+    }
+
+    public boolean remove(WorkSource other) {
+        int N1 = mNum;
+        final int[] uids1 = mUids;
+        final int N2 = other.mNum;
+        final int[] uids2 = other.mUids;
+        boolean changed = false;
+        int i1 = 0;
+        for (int i2=0; i2<N2 && i1<N1; i2++) {
+            if (uids2[i2] == uids1[i1]) {
+                N1--;
+                if (i1 < N1) System.arraycopy(uids1, i1, uids1, i1-1, N1-i1);
+            }
+            while (i1 < N1 && uids2[i2] > uids1[i1]) {
+                i1++;
+            }
+        }
+
+        mNum = N1;
+
+        return changed;
+    }
+
+    private boolean updateLocked(WorkSource other, boolean set, boolean returnNewbs) {
+        int N1 = mNum;
+        int[] uids1 = mUids;
+        final int N2 = other.mNum;
+        final int[] uids2 = other.mUids;
+        boolean changed = false;
+        int i1 = 0;
+        for (int i2=0; i2<N2; i2++) {
+            if (i1 >= N1 || uids2[i2] < uids1[i1]) {
+                // Need to insert a new uid.
+                changed = true;
+                if (uids1 == null) {
+                    uids1 = new int[4];
+                    uids1[0] = uids2[i2];
+                } else if (i1 >= uids1.length) {
+                    int[] newuids = new int[(uids1.length*3)/2];
+                    if (i1 > 0) System.arraycopy(uids1, 0, newuids, 0, i1);
+                    if (i1 < N1) System.arraycopy(uids1, i1, newuids, i1+1, N1-i1);
+                    uids1 = newuids;
+                    uids1[i1] = uids2[i2];
+                } else {
+                    if (i1 < N1) System.arraycopy(uids1, i1, uids1, i1+1, N1-i1);
+                    uids1[i1] = uids2[i2];
+                }
+                if (returnNewbs) {
+                    if (sNewbWork == null) {
+                        sNewbWork = new WorkSource(uids2[i2]);
+                    } else {
+                        sNewbWork.addLocked(uids2[i2]);
+                    }
+                }
+                N1++;
+                i1++;
+            } else {
+                if (!set) {
+                    // Skip uids that already exist or are not in 'other'.
+                    do {
+                        i1++;
+                    } while (i1 < N1 && uids2[i2] >= uids1[i1]);
+                } else {
+                    // Remove any uids that don't exist in 'other'.
+                    int start = i1;
+                    while (i1 < N1 && uids2[i2] > uids1[i1]) {
+                        if (sGoneWork == null) {
+                            sGoneWork = new WorkSource(uids1[i1]);
+                        } else {
+                            sGoneWork.addLocked(uids1[i1]);
+                        }
+                        i1++;
+                    }
+                    if (start < i1) {
+                        System.arraycopy(uids1, i1, uids1, start, i1-start);
+                        N1 -= i1-start;
+                        i1 = start;
+                    }
+                    // If there is a matching uid, skip it.
+                    if (i1 < N1 && uids2[i1] == uids1[i1]) {
+                        i1++;
+                    }
+                }
+            }
+        }
+
+        mNum = N1;
+        mUids = uids1;
+
+        return changed;
+    }
+
+    private void addLocked(int uid) {
+        if (mUids == null) {
+            mUids = new int[4];
+            mUids[0] = uid;
+            mNum = 1;
+            return;
+        }
+        if (mNum >= mUids.length) {
+            int[] newuids = new int[(mNum*3)/2];
+            System.arraycopy(mUids, 0, newuids, 0, mNum);
+            mUids = newuids;
+        }
+
+        mUids[mNum] = uid;
+        mNum++;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mNum);
+        dest.writeIntArray(mUids);
+    }
+
+    public static final Parcelable.Creator<WorkSource> CREATOR
+            = new Parcelable.Creator<WorkSource>() {
+        public WorkSource createFromParcel(Parcel in) {
+            return new WorkSource(in);
+        }
+        public WorkSource[] newArray(int size) {
+            return new WorkSource[size];
+        }
+    };
+}
diff --git a/core/java/com/android/internal/app/IBatteryStats.aidl b/core/java/com/android/internal/app/IBatteryStats.aidl
index 1620778..bd87a0d 100644
--- a/core/java/com/android/internal/app/IBatteryStats.aidl
+++ b/core/java/com/android/internal/app/IBatteryStats.aidl
@@ -18,6 +18,7 @@
 
 import com.android.internal.os.BatteryStatsImpl;
 
+import android.os.WorkSource;
 import android.telephony.SignalStrength;
 
 interface IBatteryStats {
@@ -33,6 +34,9 @@
        SensorService.cpp */
     void noteStopSensor(int uid, int sensor);
 
+    void noteStartWakelockFromSource(in WorkSource ws, int pid, String name, int type);
+    void noteStopWakelockFromSource(in WorkSource ws, int pid, String name, int type);
+
     void noteStartGps(int uid);
     void noteStopGps(int uid);
     void noteScreenOn();
@@ -57,6 +61,12 @@
     void noteScanWifiLockReleased(int uid);
     void noteWifiMulticastEnabled(int uid);
     void noteWifiMulticastDisabled(int uid);
+    void noteFullWifiLockAcquiredFromSource(in WorkSource ws);
+    void noteFullWifiLockReleasedFromSource(in WorkSource ws);
+    void noteScanWifiLockAcquiredFromSource(in WorkSource ws);
+    void noteScanWifiLockReleasedFromSource(in WorkSource ws);
+    void noteWifiMulticastEnabledFromSource(in WorkSource ws);
+    void noteWifiMulticastDisabledFromSource(in WorkSource ws);
     void setBatteryState(int status, int health, int plugType, int level, int temp, int volt);
     long getAwakeTimeBattery();
     long getAwakeTimePlugged();
diff --git a/core/java/com/android/internal/os/BatteryStatsImpl.java b/core/java/com/android/internal/os/BatteryStatsImpl.java
index b9f0c61..4943531 100644
--- a/core/java/com/android/internal/os/BatteryStatsImpl.java
+++ b/core/java/com/android/internal/os/BatteryStatsImpl.java
@@ -29,6 +29,7 @@
 import android.os.Parcelable;
 import android.os.Process;
 import android.os.SystemClock;
+import android.os.WorkSource;
 import android.telephony.ServiceState;
 import android.telephony.SignalStrength;
 import android.telephony.TelephonyManager;
@@ -68,12 +69,12 @@
     private static final int VERSION = 50;
 
     // Maximum number of items we will record in the history.
-    private static final int MAX_HISTORY_ITEMS = 1000;
+    private static final int MAX_HISTORY_ITEMS = 2000;
     
     // The maximum number of names wakelocks we will keep track of
     // per uid; once the limit is reached, we batch the remaining wakelocks
     // in to one common name.
-    private static final int MAX_WAKELOCKS_PER_UID = 20;
+    private static final int MAX_WAKELOCKS_PER_UID = 30;
     
     private static final String BATCHED_WAKELOCK_NAME = "*overflow*";
     
@@ -1173,7 +1174,7 @@
         // If the current time is basically the same as the last time,
         // just collapse into one record.
         if (mHistoryEnd != null && mHistoryEnd.cmd == HistoryItem.CMD_UPDATE
-                && (mHistoryBaseTime+curTime) < (mHistoryEnd.time+100)) {
+                && (mHistoryBaseTime+curTime) < (mHistoryEnd.time+500)) {
             // If the current is the same as the one before, then we no
             // longer need the entry.
             if (mHistoryLastEnd != null && mHistoryLastEnd.cmd == HistoryItem.CMD_UPDATE
@@ -1189,6 +1190,10 @@
             return;
         }
 
+        if (mNumHistoryItems == MAX_HISTORY_ITEMS) {
+            addHistoryRecordLocked(curTime, HistoryItem.CMD_OVERFLOW);
+        }
+
         if (mNumHistoryItems >= MAX_HISTORY_ITEMS) {
             // Once we've reached the maximum number of items, we only
             // record changes to the battery level.
@@ -1329,6 +1334,20 @@
         }
     }
 
+    public void noteStartWakeFromSourceLocked(WorkSource ws, int pid, String name, int type) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteStartWakeLocked(ws.get(i), pid, name, type);
+        }
+    }
+
+    public void noteStopWakeFromSourceLocked(WorkSource ws, int pid, String name, int type) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteStopWakeLocked(ws.get(i), pid, name, type);
+        }
+    }
+
     public int startAddingCpuLocked() {
         mHandler.removeMessages(MSG_UPDATE_WAKELOCKS);
 
@@ -1949,6 +1968,48 @@
         getUidStatsLocked(uid).noteWifiMulticastDisabledLocked();
     }
 
+    public void noteFullWifiLockAcquiredFromSourceLocked(WorkSource ws) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteFullWifiLockAcquiredLocked(ws.get(i));
+        }
+    }
+
+    public void noteFullWifiLockReleasedFromSourceLocked(WorkSource ws) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteFullWifiLockReleasedLocked(ws.get(i));
+        }
+    }
+
+    public void noteScanWifiLockAcquiredFromSourceLocked(WorkSource ws) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteScanWifiLockAcquiredLocked(ws.get(i));
+        }
+    }
+
+    public void noteScanWifiLockReleasedFromSourceLocked(WorkSource ws) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteScanWifiLockReleasedLocked(ws.get(i));
+        }
+    }
+
+    public void noteWifiMulticastEnabledFromSourceLocked(WorkSource ws) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteWifiMulticastEnabledLocked(ws.get(i));
+        }
+    }
+
+    public void noteWifiMulticastDisabledFromSourceLocked(WorkSource ws) {
+        int N = ws.size();
+        for (int i=0; i<N; i++) {
+            noteWifiMulticastDisabledLocked(ws.get(i));
+        }
+    }
+
     @Override public long getScreenOnTime(long batteryRealtime, int which) {
         return mScreenOnTimer.getTotalTimeLocked(batteryRealtime, which);
     }
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 89298ea..4d02b60 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -939,7 +939,7 @@
     <permission android:name="android.permission.UPDATE_DEVICE_STATS"
         android:label="@string/permlab_batteryStats"
         android:description="@string/permdesc_batteryStats"
-        android:protectionLevel="signature" />
+        android:protectionLevel="signatureOrSystem" />
 
     <!-- Allows an application to open windows that are for use by parts
          of the system user interface.  Not for use by third party apps. -->
diff --git a/location/java/android/location/ILocationProvider.aidl b/location/java/android/location/ILocationProvider.aidl
index 2b9782a..ecf6789 100644
--- a/location/java/android/location/ILocationProvider.aidl
+++ b/location/java/android/location/ILocationProvider.aidl
@@ -20,6 +20,7 @@
 import android.location.Location;
 import android.net.NetworkInfo;
 import android.os.Bundle;
+import android.os.WorkSource;
 
 /**
  * Binder interface for services that implement location providers.
@@ -43,7 +44,7 @@
     long getStatusUpdateTime();
     String getInternalState();
     void enableLocationTracking(boolean enable);
-    void setMinTime(long minTime);
+    void setMinTime(long minTime, in WorkSource ws);
     void updateNetworkState(int state, in NetworkInfo info);
     void updateLocation(in Location location);
     boolean sendExtraCommand(String command, inout Bundle extras);
diff --git a/location/java/android/location/provider/LocationProvider.java b/location/java/android/location/provider/LocationProvider.java
index cf939de..95b4425 100644
--- a/location/java/android/location/provider/LocationProvider.java
+++ b/location/java/android/location/provider/LocationProvider.java
@@ -26,6 +26,7 @@
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.os.WorkSource;
 import android.util.Log;
 
 /**
@@ -106,8 +107,8 @@
             LocationProvider.this.onEnableLocationTracking(enable);
         }
 
-        public void setMinTime(long minTime) {
-            LocationProvider.this.onSetMinTime(minTime);
+        public void setMinTime(long minTime, WorkSource ws) {
+            LocationProvider.this.onSetMinTime(minTime, ws);
         }
 
         public void updateNetworkState(int state, NetworkInfo info) {
@@ -123,11 +124,11 @@
         }
 
         public void addListener(int uid) {
-            LocationProvider.this.onAddListener(uid);
+            LocationProvider.this.onAddListener(uid, new WorkSource(uid));
         }
 
         public void removeListener(int uid) {
-            LocationProvider.this.onRemoveListener(uid);
+            LocationProvider.this.onRemoveListener(uid, new WorkSource(uid));
         }
     };
 
@@ -303,8 +304,9 @@
      * the frequency of updates to match the requested frequency.
      *
      * @param minTime the smallest minTime value over all listeners for this provider.
+     * @param ws the source this work is coming from.
      */
-    public abstract void onSetMinTime(long minTime);
+    public abstract void onSetMinTime(long minTime, WorkSource ws);
 
     /**
      * Updates the network state for the given provider. This function must
@@ -340,14 +342,16 @@
      * Notifies the location provider when a new client is listening for locations.
      *
      * @param uid user ID of the new client.
+     * @param ws a WorkSource representation of the client.
      */
-    public abstract void onAddListener(int uid);
+    public abstract void onAddListener(int uid, WorkSource ws);
 
     /**
      * Notifies the location provider when a client is no longer listening for locations.
      *
      * @param uid user ID of the client no longer listening.
+     * @param ws a WorkSource representation of the client.
      */
-    public abstract void onRemoveListener(int uid);
+    public abstract void onRemoveListener(int uid, WorkSource ws);
 }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarPolicy.java b/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarPolicy.java
index b4e0d3a..5dedcc9 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarPolicy.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarPolicy.java
@@ -718,7 +718,6 @@
                     iconId = sWifiSignalImages[mLastWifiInetConnectivityState]
                             [mLastWifiSignalLevel];
                 }
-
                 mService.setIcon("wifi", iconId, 0);
                 // Show the icon since wi-fi is connected
                 mService.setIconVisibility("wifi", true);
@@ -1101,7 +1100,7 @@
             int iconId;
             final int newRssi = intent.getIntExtra(WifiManager.EXTRA_NEW_RSSI, -200);
             int newSignalLevel = WifiManager.calculateSignalLevel(newRssi,
-                                                                  sWifiSignalImages.length);
+                                                                  sWifiSignalImages[0].length);
             if (newSignalLevel != mLastWifiSignalLevel) {
                 mLastWifiSignalLevel = newSignalLevel;
                 if (mIsWifiConnected) {
diff --git a/services/java/com/android/server/BackupManagerService.java b/services/java/com/android/server/BackupManagerService.java
index e454c08..aa87f29 100644
--- a/services/java/com/android/server/BackupManagerService.java
+++ b/services/java/com/android/server/BackupManagerService.java
@@ -54,6 +54,7 @@
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.SystemClock;
+import android.os.WorkSource;
 import android.provider.Settings;
 import android.util.EventLog;
 import android.util.Slog;
@@ -504,7 +505,7 @@
         parseLeftoverJournals();
 
         // Power management
-        mWakelock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "backup");
+        mWakelock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "*backup*");
 
         // Start the backup passes going
         setBackupEnabled(areEnabled);
@@ -1363,6 +1364,7 @@
                         ? IApplicationThread.BACKUP_MODE_FULL
                         : IApplicationThread.BACKUP_MODE_INCREMENTAL;
                 try {
+                    mWakelock.setWorkSource(new WorkSource(request.appInfo.uid));
                     agent = bindToAgentSynchronous(request.appInfo, mode);
                     if (agent != null) {
                         int result = processOneBackup(request, agent, transport);
@@ -1378,6 +1380,8 @@
                 }
             }
 
+            mWakelock.setWorkSource(null);
+
             return BackupConstants.TRANSPORT_OK;
         }
 
diff --git a/services/java/com/android/server/LocationManagerService.java b/services/java/com/android/server/LocationManagerService.java
index a343c59..8452a9f 100644
--- a/services/java/com/android/server/LocationManagerService.java
+++ b/services/java/com/android/server/LocationManagerService.java
@@ -52,6 +52,7 @@
 import android.os.PowerManager;
 import android.os.Process;
 import android.os.RemoteException;
+import android.os.WorkSource;
 import android.provider.Settings;
 import android.util.Log;
 import android.util.Slog;
@@ -157,6 +158,12 @@
     private final HashMap<String,ArrayList<UpdateRecord>> mRecordsByProvider =
         new HashMap<String,ArrayList<UpdateRecord>>();
 
+    /**
+     * Temporary filled in when computing min time for a provider.  Access is
+     * protected by global lock mLock.
+     */
+    private final WorkSource mTmpWorkSource = new WorkSource();
+
     // Proximity listeners
     private Receiver mProximityReceiver = null;
     private ILocationListener mProximityListener = null;
@@ -913,7 +920,7 @@
         if (enabled) {
             p.enable();
             if (listeners > 0) {
-                p.setMinTime(getMinTimeLocked(provider));
+                p.setMinTime(getMinTimeLocked(provider), mTmpWorkSource);
                 p.enableLocationTracking(true);
             }
         } else {
@@ -925,9 +932,21 @@
     private long getMinTimeLocked(String provider) {
         long minTime = Long.MAX_VALUE;
         ArrayList<UpdateRecord> records = mRecordsByProvider.get(provider);
+        mTmpWorkSource.clear();
         if (records != null) {
             for (int i=records.size()-1; i>=0; i--) {
-                minTime = Math.min(minTime, records.get(i).mMinTime);
+                UpdateRecord ur = records.get(i);
+                long curTime = ur.mMinTime;
+                if (curTime < minTime) {
+                    minTime = curTime;
+                }
+            }
+            long inclTime = (minTime*3)/2;
+            for (int i=records.size()-1; i>=0; i--) {
+                UpdateRecord ur = records.get(i);
+                if (ur.mMinTime <= inclTime) {
+                    mTmpWorkSource.add(ur.mUid);
+                }
             }
         }
         return minTime;
@@ -1125,7 +1144,7 @@
             boolean isProviderEnabled = isAllowedBySettingsLocked(provider);
             if (isProviderEnabled) {
                 long minTimeForProvider = getMinTimeLocked(provider);
-                p.setMinTime(minTimeForProvider);
+                p.setMinTime(minTimeForProvider, mTmpWorkSource);
                 // try requesting single shot if singleShot is true, and fall back to
                 // regular location tracking if requestSingleShotFix() is not supported
                 if (!singleShot || !p.requestSingleShotFix()) {
@@ -1223,7 +1242,7 @@
                 LocationProviderInterface p = mProvidersByName.get(provider);
                 if (p != null) {
                     if (hasOtherListener) {
-                        p.setMinTime(getMinTimeLocked(provider));
+                        p.setMinTime(getMinTimeLocked(provider), mTmpWorkSource);
                     } else {
                         p.enableLocationTracking(false);
                     }
diff --git a/services/java/com/android/server/PowerManagerService.java b/services/java/com/android/server/PowerManagerService.java
index 2e32e60..4d68b52 100644
--- a/services/java/com/android/server/PowerManagerService.java
+++ b/services/java/com/android/server/PowerManagerService.java
@@ -50,6 +50,7 @@
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.SystemClock;
+import android.os.WorkSource;
 import android.provider.Settings.SettingNotFoundException;
 import android.provider.Settings;
 import android.util.EventLog;
@@ -310,7 +311,7 @@
                 long ident = Binder.clearCallingIdentity();
                 try {
                     PowerManagerService.this.acquireWakeLockLocked(mFlags, mToken,
-                            MY_UID, MY_PID, mTag);
+                            MY_UID, MY_PID, mTag, null);
                     mHeld = true;
                 } finally {
                     Binder.restoreCallingIdentity(ident);
@@ -607,6 +608,7 @@
         final int uid;
         final int pid;
         final int monitorType;
+        WorkSource ws;
         boolean activated = true;
         int minState;
     }
@@ -630,35 +632,74 @@
                 || n == PowerManager.SCREEN_DIM_WAKE_LOCK;
     }
 
-    public void acquireWakeLock(int flags, IBinder lock, String tag) {
+    void enforceWakeSourcePermission(int uid, int pid) {
+        if (uid == Process.myUid()) {
+            return;
+        }
+        mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS,
+                pid, uid, null);
+    }
+
+    public void acquireWakeLock(int flags, IBinder lock, String tag, WorkSource ws) {
         int uid = Binder.getCallingUid();
         int pid = Binder.getCallingPid();
         if (uid != Process.myUid()) {
             mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
         }
+        if (ws != null) {
+            enforceWakeSourcePermission(uid, pid);
+        }
         long ident = Binder.clearCallingIdentity();
         try {
             synchronized (mLocks) {
-                acquireWakeLockLocked(flags, lock, uid, pid, tag);
+                acquireWakeLockLocked(flags, lock, uid, pid, tag, ws);
             }
         } finally {
             Binder.restoreCallingIdentity(ident);
         }
     }
 
-    public void acquireWakeLockLocked(int flags, IBinder lock, int uid, int pid, String tag) {
-        int acquireUid = -1;
-        int acquirePid = -1;
-        String acquireName = null;
-        int acquireType = -1;
+    void noteStartWakeLocked(WakeLock wl, WorkSource ws) {
+        try {
+            if (ws != null) {
+                mBatteryStats.noteStartWakelockFromSource(ws, wl.pid, wl.tag,
+                        wl.monitorType);
+            } else {
+                mBatteryStats.noteStartWakelock(wl.uid, wl.pid, wl.tag, wl.monitorType);
+            }
+        } catch (RemoteException e) {
+            // Ignore
+        }
+    }
 
+    void noteStopWakeLocked(WakeLock wl, WorkSource ws) {
+        try {
+            if (ws != null) {
+                mBatteryStats.noteStopWakelockFromSource(ws, wl.pid, wl.tag,
+                        wl.monitorType);
+            } else {
+                mBatteryStats.noteStopWakelock(wl.uid, wl.pid, wl.tag, wl.monitorType);
+            }
+        } catch (RemoteException e) {
+            // Ignore
+        }
+    }
+
+    public void acquireWakeLockLocked(int flags, IBinder lock, int uid, int pid, String tag,
+            WorkSource ws) {
         if (mSpew) {
             Slog.d(TAG, "acquireWakeLock flags=0x" + Integer.toHexString(flags) + " tag=" + tag);
         }
 
+        if (ws != null && ws.size() == 0) {
+            ws = null;
+        }
+
         int index = mLocks.getIndex(lock);
         WakeLock wl;
         boolean newlock;
+        boolean diffsource;
+        WorkSource oldsource;
         if (index < 0) {
             wl = new WakeLock(flags, lock, tag, uid, pid);
             switch (wl.flags & LOCK_MASK)
@@ -687,10 +728,31 @@
                     return;
             }
             mLocks.addLock(wl);
+            if (ws != null) {
+                wl.ws = new WorkSource(ws);
+            }
             newlock = true;
+            diffsource = false;
+            oldsource = null;
         } else {
             wl = mLocks.get(index);
             newlock = false;
+            oldsource = wl.ws;
+            if (oldsource != null) {
+                if (ws == null) {
+                    wl.ws = null;
+                    diffsource = true;
+                } else {
+                    diffsource = oldsource.diff(ws);
+                }
+            } else if (ws != null) {
+                diffsource = true;
+            } else {
+                diffsource = false;
+            }
+            if (diffsource) {
+                wl.ws = new WorkSource(ws);
+            }
         }
         if (isScreenLock(flags)) {
             // if this causes a wakeup, we reactivate all of the locks and
@@ -731,19 +793,41 @@
                 enableProximityLockLocked();
             }
         }
-        if (newlock) {
-            acquireUid = wl.uid;
-            acquirePid = wl.pid;
-            acquireName = wl.tag;
-            acquireType = wl.monitorType;
-        }
 
-        if (acquireType >= 0) {
-            try {
-                mBatteryStats.noteStartWakelock(acquireUid, acquirePid, acquireName, acquireType);
-            } catch (RemoteException e) {
-                // Ignore
+        if (diffsource) {
+            // If the lock sources have changed, need to first release the
+            // old ones.
+            noteStopWakeLocked(wl, oldsource);
+        }
+        if (newlock || diffsource) {
+            noteStartWakeLocked(wl, ws);
+        }
+    }
+
+    public void updateWakeLockWorkSource(IBinder lock, WorkSource ws) {
+        int uid = Binder.getCallingUid();
+        int pid = Binder.getCallingPid();
+        if (ws != null && ws.size() == 0) {
+            ws = null;
+        }
+        if (ws != null) {
+            enforceWakeSourcePermission(uid, pid);
+        }
+        long ident = Binder.clearCallingIdentity();
+        try {
+            synchronized (mLocks) {
+                int index = mLocks.getIndex(lock);
+                if (index < 0) {
+                    throw new IllegalArgumentException("Wake lock not active");
+                }
+                WakeLock wl = mLocks.get(index);
+                WorkSource oldsource = wl.ws;
+                wl.ws = ws != null ? new WorkSource(ws) : null;
+                noteStopWakeLocked(wl, oldsource);
+                noteStartWakeLocked(wl, ws);
             }
+        } finally {
+            Binder.restoreCallingIdentity(ident);
         }
     }
 
@@ -759,11 +843,6 @@
     }
 
     private void releaseWakeLockLocked(IBinder lock, int flags, boolean death) {
-        int releaseUid;
-        int releasePid;
-        String releaseName;
-        int releaseType;
-
         WakeLock wl = mLocks.removeLock(lock);
         if (wl == null) {
             return;
@@ -804,17 +883,11 @@
         }
         // Unlink the lock from the binder.
         wl.binder.unlinkToDeath(wl, 0);
-        releaseUid = wl.uid;
-        releasePid = wl.pid;
-        releaseName = wl.tag;
-        releaseType = wl.monitorType;
 
-        if (releaseType >= 0) {
+        if (wl.monitorType >= 0) {
             long origId = Binder.clearCallingIdentity();
             try {
-                mBatteryStats.noteStopWakelock(releaseUid, releasePid, releaseName, releaseType);
-            } catch (RemoteException e) {
-                // Ignore
+                noteStopWakeLocked(wl, wl.ws);
             } finally {
                 Binder.restoreCallingIdentity(origId);
             }
diff --git a/services/java/com/android/server/VibratorService.java b/services/java/com/android/server/VibratorService.java
index 2e7e3e1..f0b5955 100755
--- a/services/java/com/android/server/VibratorService.java
+++ b/services/java/com/android/server/VibratorService.java
@@ -29,6 +29,7 @@
 import android.os.IBinder;
 import android.os.Binder;
 import android.os.SystemClock;
+import android.os.WorkSource;
 import android.util.Slog;
 
 import java.util.LinkedList;
@@ -39,6 +40,7 @@
 
     private final LinkedList<Vibration> mVibrations;
     private Vibration mCurrentVibration;
+    private final WorkSource mTmpWorkSource = new WorkSource();
 
     private class Vibration implements IBinder.DeathRecipient {
         private final IBinder mToken;
@@ -46,22 +48,24 @@
         private final long    mStartTime;
         private final long[]  mPattern;
         private final int     mRepeat;
+        private final int     mUid;
 
-        Vibration(IBinder token, long millis) {
-            this(token, millis, null, 0);
+        Vibration(IBinder token, long millis, int uid) {
+            this(token, millis, null, 0, uid);
         }
 
-        Vibration(IBinder token, long[] pattern, int repeat) {
-            this(token, 0, pattern, repeat);
+        Vibration(IBinder token, long[] pattern, int repeat, int uid) {
+            this(token, 0, pattern, repeat, uid);
         }
 
         private Vibration(IBinder token, long millis, long[] pattern,
-                int repeat) {
+                int repeat, int uid) {
             mToken = token;
             mTimeout = millis;
             mStartTime = SystemClock.uptimeMillis();
             mPattern = pattern;
             mRepeat = repeat;
+            mUid = uid;
         }
 
         public void binderDied() {
@@ -98,7 +102,7 @@
         mContext = context;
         PowerManager pm = (PowerManager)context.getSystemService(
                 Context.POWER_SERVICE);
-        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
+        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "*vibrator*");
         mWakeLock.setReferenceCounted(true);
 
         mVibrations = new LinkedList<Vibration>();
@@ -113,6 +117,7 @@
                 != PackageManager.PERMISSION_GRANTED) {
             throw new SecurityException("Requires VIBRATE permission");
         }
+        int uid = Binder.getCallingUid();
         // We're running in the system server so we cannot crash. Check for a
         // timeout of 0 or negative. This will ensure that a vibration has
         // either a timeout of > 0 or a non-null pattern.
@@ -122,7 +127,7 @@
             // longer than milliseconds.
             return;
         }
-        Vibration vib = new Vibration(token, milliseconds);
+        Vibration vib = new Vibration(token, milliseconds, uid);
         synchronized (mVibrations) {
             removeVibrationLocked(token);
             doCancelVibrateLocked();
@@ -146,6 +151,7 @@
                 != PackageManager.PERMISSION_GRANTED) {
             throw new SecurityException("Requires VIBRATE permission");
         }
+        int uid = Binder.getCallingUid();
         // so wakelock calls will succeed
         long identity = Binder.clearCallingIdentity();
         try {
@@ -165,7 +171,7 @@
                 return;
             }
 
-            Vibration vib = new Vibration(token, pattern, repeat);
+            Vibration vib = new Vibration(token, pattern, repeat, uid);
             try {
                 token.linkToDeath(vib, 0);
             } catch (RemoteException e) {
@@ -280,6 +286,8 @@
 
         VibrateThread(Vibration vib) {
             mVibration = vib;
+            mTmpWorkSource.set(vib.mUid);
+            mWakeLock.setWorkSource(mTmpWorkSource);
             mWakeLock.acquire();
         }
 
diff --git a/services/java/com/android/server/WifiService.java b/services/java/com/android/server/WifiService.java
index 6ecc511..e8502fa 100644
--- a/services/java/com/android/server/WifiService.java
+++ b/services/java/com/android/server/WifiService.java
@@ -50,6 +50,7 @@
 import android.os.Message;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.os.WorkSource;
 import android.provider.Settings;
 import android.text.TextUtils;
 import android.util.Slog;
@@ -1035,8 +1036,8 @@
     }
 
     private class WifiLock extends DeathRecipient {
-        WifiLock(int lockMode, String tag, IBinder binder) {
-            super(lockMode, tag, binder);
+        WifiLock(int lockMode, String tag, IBinder binder, WorkSource ws) {
+            super(lockMode, tag, binder, ws);
         }
 
         public void binderDied() {
@@ -1106,33 +1107,70 @@
         }
     }
 
-    public boolean acquireWifiLock(IBinder binder, int lockMode, String tag) {
+    void enforceWakeSourcePermission(int uid, int pid) {
+        if (uid == android.os.Process.myUid()) {
+            return;
+        }
+        mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS,
+                pid, uid, null);
+    }
+
+    public boolean acquireWifiLock(IBinder binder, int lockMode, String tag, WorkSource ws) {
         mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
         if (lockMode != WifiManager.WIFI_MODE_FULL && lockMode != WifiManager.WIFI_MODE_SCAN_ONLY) {
             return false;
         }
-        WifiLock wifiLock = new WifiLock(lockMode, tag, binder);
+        if (ws != null) {
+            enforceWakeSourcePermission(Binder.getCallingUid(), Binder.getCallingPid());
+        }
+        if (ws != null && ws.size() == 0) {
+            ws = null;
+        }
+        if (ws == null) {
+            ws = new WorkSource(Binder.getCallingUid());
+        }
+        WifiLock wifiLock = new WifiLock(lockMode, tag, binder, ws);
         synchronized (mLocks) {
             return acquireWifiLockLocked(wifiLock);
         }
     }
 
+    private void noteAcquireWifiLock(WifiLock wifiLock) throws RemoteException {
+        switch(wifiLock.mMode) {
+            case WifiManager.WIFI_MODE_FULL:
+                mBatteryStats.noteFullWifiLockAcquiredFromSource(wifiLock.mWorkSource);
+                break;
+            case WifiManager.WIFI_MODE_SCAN_ONLY:
+                mBatteryStats.noteScanWifiLockAcquiredFromSource(wifiLock.mWorkSource);
+                break;
+        }
+    }
+
+    private void noteReleaseWifiLock(WifiLock wifiLock) throws RemoteException {
+        switch(wifiLock.mMode) {
+            case WifiManager.WIFI_MODE_FULL:
+                mBatteryStats.noteFullWifiLockReleasedFromSource(wifiLock.mWorkSource);
+                break;
+            case WifiManager.WIFI_MODE_SCAN_ONLY:
+                mBatteryStats.noteScanWifiLockReleasedFromSource(wifiLock.mWorkSource);
+                break;
+        }
+    }
+
     private boolean acquireWifiLockLocked(WifiLock wifiLock) {
         Slog.d(TAG, "acquireWifiLockLocked: " + wifiLock);
 
         mLocks.addLock(wifiLock);
 
-        int uid = Binder.getCallingUid();
         long ident = Binder.clearCallingIdentity();
         try {
+            noteAcquireWifiLock(wifiLock);
             switch(wifiLock.mMode) {
             case WifiManager.WIFI_MODE_FULL:
                 ++mFullLocksAcquired;
-                mBatteryStats.noteFullWifiLockAcquired(uid);
                 break;
             case WifiManager.WIFI_MODE_SCAN_ONLY:
                 ++mScanLocksAcquired;
-                mBatteryStats.noteScanWifiLockAcquired(uid);
                 break;
             }
         } catch (RemoteException e) {
@@ -1144,6 +1182,33 @@
         return true;
     }
 
+    public void updateWifiLockWorkSource(IBinder lock, WorkSource ws) {
+        int uid = Binder.getCallingUid();
+        int pid = Binder.getCallingPid();
+        if (ws != null && ws.size() == 0) {
+            ws = null;
+        }
+        if (ws != null) {
+            enforceWakeSourcePermission(uid, pid);
+        }
+        long ident = Binder.clearCallingIdentity();
+        try {
+            synchronized (mLocks) {
+                int index = mLocks.findLockByBinder(lock);
+                if (index < 0) {
+                    throw new IllegalArgumentException("Wifi lock not active");
+                }
+                WifiLock wl = mLocks.mList.get(index);
+                noteReleaseWifiLock(wl);
+                wl.mWorkSource = ws != null ? new WorkSource(ws) : new WorkSource(uid);
+                noteAcquireWifiLock(wl);
+            }
+        } catch (RemoteException e) {
+        } finally {
+            Binder.restoreCallingIdentity(ident);
+        }
+    }
+
     public boolean releaseWifiLock(IBinder lock) {
         mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
         synchronized (mLocks) {
@@ -1161,17 +1226,15 @@
         hadLock = (wifiLock != null);
 
         if (hadLock) {
-            int uid = Binder.getCallingUid();
             long ident = Binder.clearCallingIdentity();
             try {
+                noteAcquireWifiLock(wifiLock);
                 switch(wifiLock.mMode) {
                     case WifiManager.WIFI_MODE_FULL:
                         ++mFullLocksReleased;
-                        mBatteryStats.noteFullWifiLockReleased(uid);
                         break;
                     case WifiManager.WIFI_MODE_SCAN_ONLY:
                         ++mScanLocksReleased;
-                        mBatteryStats.noteScanWifiLockReleased(uid);
                         break;
                 }
             } catch (RemoteException e) {
@@ -1189,12 +1252,14 @@
         String mTag;
         int mMode;
         IBinder mBinder;
+        WorkSource mWorkSource;
 
-        DeathRecipient(int mode, String tag, IBinder binder) {
+        DeathRecipient(int mode, String tag, IBinder binder, WorkSource ws) {
             super();
             mTag = tag;
             mMode = mode;
             mBinder = binder;
+            mWorkSource = ws;
             try {
                 mBinder.linkToDeath(this, 0);
             } catch (RemoteException e) {
@@ -1209,7 +1274,7 @@
 
     private class Multicaster extends DeathRecipient {
         Multicaster(String tag, IBinder binder) {
-            super(Binder.getCallingUid(), tag, binder);
+            super(Binder.getCallingUid(), tag, binder, null);
         }
 
         public void binderDied() {
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index 73c1790..5432890 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -6021,12 +6021,18 @@
                             finisher = new IIntentReceiver.Stub() {
                                 public void performReceive(Intent intent, int resultCode,
                                         String data, Bundle extras, boolean ordered,
-                                        boolean sticky)
-                                        throws RemoteException {
-                                    synchronized (ActivityManagerService.this) {
-                                        mDidUpdate = true;
-                                    }
-                                    systemReady(goingCallback);
+                                        boolean sticky) {
+                                    // The raw IIntentReceiver interface is called
+                                    // with the AM lock held, so redispatch to
+                                    // execute our code without the lock.
+                                    mHandler.post(new Runnable() {
+                                        public void run() {
+                                            synchronized (ActivityManagerService.this) {
+                                                mDidUpdate = true;
+                                            }
+                                            systemReady(goingCallback);
+                                        }
+                                    });
                                 }
                             };
                         }
diff --git a/services/java/com/android/server/am/BatteryStatsService.java b/services/java/com/android/server/am/BatteryStatsService.java
index 7314e04..bb40967 100644
--- a/services/java/com/android/server/am/BatteryStatsService.java
+++ b/services/java/com/android/server/am/BatteryStatsService.java
@@ -23,6 +23,7 @@
 import android.os.Parcel;
 import android.os.Process;
 import android.os.ServiceManager;
+import android.os.WorkSource;
 import android.telephony.SignalStrength;
 import android.util.Slog;
 
@@ -107,6 +108,20 @@
         }
     }
 
+    public void noteStartWakelockFromSource(WorkSource ws, int pid, String name, int type) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteStartWakeFromSourceLocked(ws, pid, name, type);
+        }
+    }
+
+    public void noteStopWakelockFromSource(WorkSource ws, int pid, String name, int type) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteStopWakeFromSourceLocked(ws, pid, name, type);
+        }
+    }
+
     public void noteStartSensor(int uid, int sensor) {
         enforceCallingPermission();
         synchronized (mStats) {
@@ -317,6 +332,48 @@
         }
     }
 
+    public void noteFullWifiLockAcquiredFromSource(WorkSource ws) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteFullWifiLockAcquiredFromSourceLocked(ws);
+        }
+    }
+
+    public void noteFullWifiLockReleasedFromSource(WorkSource ws) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteFullWifiLockReleasedFromSourceLocked(ws);
+        }
+    }
+
+    public void noteScanWifiLockAcquiredFromSource(WorkSource ws) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteScanWifiLockAcquiredFromSourceLocked(ws);
+        }
+    }
+
+    public void noteScanWifiLockReleasedFromSource(WorkSource ws) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteScanWifiLockReleasedFromSourceLocked(ws);
+        }
+    }
+
+    public void noteWifiMulticastEnabledFromSource(WorkSource ws) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteWifiMulticastEnabledFromSourceLocked(ws);
+        }
+    }
+
+    public void noteWifiMulticastDisabledFromSource(WorkSource ws) {
+        enforceCallingPermission();
+        synchronized (mStats) {
+            mStats.noteWifiMulticastDisabledFromSourceLocked(ws);
+        }
+    }
+
     public boolean isOnBattery() {
         return mStats.isOnBattery();
     }
diff --git a/services/java/com/android/server/location/GpsLocationProvider.java b/services/java/com/android/server/location/GpsLocationProvider.java
index c1165c7..3bf6ee4 100755
--- a/services/java/com/android/server/location/GpsLocationProvider.java
+++ b/services/java/com/android/server/location/GpsLocationProvider.java
@@ -44,6 +44,7 @@
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.SystemClock;
+import android.os.WorkSource;
 import android.provider.Settings;
 import android.util.Log;
 import android.util.SparseIntArray;
@@ -736,7 +737,7 @@
         startNavigating(true);
     }
 
-    public void setMinTime(long minTime) {
+    public void setMinTime(long minTime, WorkSource ws) {
         if (DEBUG) Log.d(TAG, "setMinTime " + minTime);
         
         if (minTime >= 0) {
@@ -779,7 +780,7 @@
     public void addListener(int uid) {
         synchronized (mWakeLock) {
             mPendingListenerMessages++;
-           mWakeLock.acquire();
+            mWakeLock.acquire();
             Message m = Message.obtain(mHandler, ADD_LISTENER);
             m.arg1 = uid;
             mHandler.sendMessage(m);
diff --git a/services/java/com/android/server/location/LocationProviderInterface.java b/services/java/com/android/server/location/LocationProviderInterface.java
index 084ab81..858a582 100644
--- a/services/java/com/android/server/location/LocationProviderInterface.java
+++ b/services/java/com/android/server/location/LocationProviderInterface.java
@@ -20,6 +20,7 @@
 import android.location.Location;
 import android.net.NetworkInfo;
 import android.os.Bundle;
+import android.os.WorkSource;
 
 /**
  * Location Manager's interface for location providers.
@@ -47,7 +48,7 @@
     /* returns false if single shot is not supported */
     boolean requestSingleShotFix();
     String getInternalState();
-    void setMinTime(long minTime);
+    void setMinTime(long minTime, WorkSource ws);
     void updateNetworkState(int state, NetworkInfo info);
     void updateLocation(Location location);
     boolean sendExtraCommand(String command, Bundle extras);
diff --git a/services/java/com/android/server/location/LocationProviderProxy.java b/services/java/com/android/server/location/LocationProviderProxy.java
index 24d7737..7dc9920 100644
--- a/services/java/com/android/server/location/LocationProviderProxy.java
+++ b/services/java/com/android/server/location/LocationProviderProxy.java
@@ -29,6 +29,7 @@
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.SystemClock;
+import android.os.WorkSource;
 import android.util.Log;
 
 import com.android.internal.location.DummyLocationProvider;
@@ -52,6 +53,7 @@
     private boolean mLocationTracking = false;
     private boolean mEnabled = false;
     private long mMinTime = -1;
+    private WorkSource mMinTimeSource = new WorkSource();
     private int mNetworkState;
     private NetworkInfo mNetworkInfo;
 
@@ -122,7 +124,7 @@
                     provider.enableLocationTracking(true);
                 }
                 if (mMinTime >= 0) {
-                    provider.setMinTime(mMinTime);
+                    provider.setMinTime(mMinTime, mMinTimeSource);
                 }
                 if (mNetworkInfo != null) {
                     provider.updateNetworkState(mNetworkState, mNetworkInfo);
@@ -318,6 +320,7 @@
         mLocationTracking = enable;
         if (!enable) {
             mMinTime = -1;
+            mMinTimeSource.clear();
         }
         ILocationProvider provider;
         synchronized (mServiceConnection) {
@@ -339,15 +342,16 @@
         return mMinTime;
     }
 
-    public void setMinTime(long minTime) {
-       mMinTime = minTime;
+    public void setMinTime(long minTime, WorkSource ws) {
+        mMinTime = minTime;
+        mMinTimeSource.set(ws);
         ILocationProvider provider;
         synchronized (mServiceConnection) {
             provider = mProvider;
         }
         if (provider != null) {
             try {
-                provider.setMinTime(minTime);
+                provider.setMinTime(minTime, ws);
             } catch (RemoteException e) {
             }
         }
diff --git a/services/java/com/android/server/location/MockProvider.java b/services/java/com/android/server/location/MockProvider.java
index 01b34b7..09d799f 100644
--- a/services/java/com/android/server/location/MockProvider.java
+++ b/services/java/com/android/server/location/MockProvider.java
@@ -23,6 +23,7 @@
 import android.net.NetworkInfo;
 import android.os.Bundle;
 import android.os.RemoteException;
+import android.os.WorkSource;
 import android.util.Log;
 import android.util.PrintWriterPrinter;
 
@@ -201,7 +202,7 @@
         return false;
     }
 
-    public void setMinTime(long minTime) {
+    public void setMinTime(long minTime, WorkSource ws) {
     }
 
     public void updateNetworkState(int state, NetworkInfo info) {
diff --git a/services/java/com/android/server/location/PassiveProvider.java b/services/java/com/android/server/location/PassiveProvider.java
index 7fc93f8..ea0d1b0 100644
--- a/services/java/com/android/server/location/PassiveProvider.java
+++ b/services/java/com/android/server/location/PassiveProvider.java
@@ -24,6 +24,7 @@
 import android.net.NetworkInfo;
 import android.os.Bundle;
 import android.os.RemoteException;
+import android.os.WorkSource;
 import android.util.Log;
 
 /**
@@ -123,7 +124,7 @@
         return false;
     }
 
-    public void setMinTime(long minTime) {
+    public void setMinTime(long minTime, WorkSource ws) {
     }
 
     public void updateNetworkState(int state, NetworkInfo info) {
diff --git a/wifi/java/android/net/wifi/IWifiManager.aidl b/wifi/java/android/net/wifi/IWifiManager.aidl
index 1913fa0..e73bca0 100644
--- a/wifi/java/android/net/wifi/IWifiManager.aidl
+++ b/wifi/java/android/net/wifi/IWifiManager.aidl
@@ -21,6 +21,8 @@
 import android.net.wifi.ScanResult;
 import android.net.DhcpInfo;
 
+import android.os.WorkSource;
+
 /**
  * Interface that allows controlling and querying Wi-Fi connectivity.
  *
@@ -66,7 +68,9 @@
 
     DhcpInfo getDhcpInfo();
 
-    boolean acquireWifiLock(IBinder lock, int lockType, String tag);
+    boolean acquireWifiLock(IBinder lock, int lockType, String tag, in WorkSource ws);
+
+    void updateWifiLockWorkSource(IBinder lock, in WorkSource ws);
 
     boolean releaseWifiLock(IBinder lock);
 
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index 8c3ec5f..26ed878 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -23,6 +23,7 @@
 import android.os.IBinder;
 import android.os.Handler;
 import android.os.RemoteException;
+import android.os.WorkSource;
 
 import java.util.List;
 
@@ -1050,6 +1051,7 @@
         int mLockType;
         private boolean mRefCounted;
         private boolean mHeld;
+        private WorkSource mWorkSource;
 
         private WifiLock(int lockType, String tag) {
             mTag = tag;
@@ -1075,7 +1077,7 @@
             synchronized (mBinder) {
                 if (mRefCounted ? (++mRefCount > 0) : (!mHeld)) {
                     try {
-                        mService.acquireWifiLock(mBinder, mLockType, mTag);
+                        mService.acquireWifiLock(mBinder, mLockType, mTag, mWorkSource);
                         synchronized (WifiManager.this) {
                             if (mActiveLockCount >= MAX_ACTIVE_LOCKS) {
                                 mService.releaseWifiLock(mBinder);
@@ -1147,6 +1149,32 @@
             }
         }
 
+        public void setWorkSource(WorkSource ws) {
+            synchronized (mBinder) {
+                if (ws != null && ws.size() == 0) {
+                    ws = null;
+                }
+                boolean changed = true;
+                if (ws == null) {
+                    mWorkSource = null;
+                } else if (mWorkSource == null) {
+                    changed = mWorkSource != null;
+                    mWorkSource = new WorkSource(ws);
+                } else {
+                    changed = mWorkSource.diff(ws);
+                    if (changed) {
+                        mWorkSource.set(ws);
+                    }
+                }
+                if (changed && mHeld) {
+                    try {
+                        mService.updateWifiLockWorkSource(mBinder, mWorkSource);
+                    } catch (RemoteException e) {
+                    }
+                }
+            }
+        }
+
         public String toString() {
             String s1, s2, s3;
             synchronized (mBinder) {