diff --git a/core/java/com/android/internal/os/KernelWakelockReader.java b/core/java/com/android/internal/os/KernelWakelockReader.java
index e595db384cb98..c4168141f1841 100644
--- a/core/java/com/android/internal/os/KernelWakelockReader.java
+++ b/core/java/com/android/internal/os/KernelWakelockReader.java
@@ -78,13 +78,16 @@ public class KernelWakelockReader {
         boolean useSystemSuspend = (new File(sSysClassWakeupDir)).exists();
 
         if (useSystemSuspend) {
-            // Get both kernel and native wakelock stats from SystemSuspend
-            updateVersion(staleStats);
-            if (getWakelockStatsFromSystemSuspend(staleStats) == null) {
-                Slog.w(TAG, "Failed to get wakelock stats from SystemSuspend");
-                return null;
+            // static read/write lock protection for sKernelWakelockUpdateVersion
+            synchronized (KernelWakelockReader.class) {
+                // Get both kernel and native wakelock stats from SystemSuspend
+                updateVersion(staleStats);
+                if (getWakelockStatsFromSystemSuspend(staleStats) == null) {
+                    Slog.w(TAG, "Failed to get wakelock stats from SystemSuspend");
+                    return null;
+                }
+                return removeOldStats(staleStats);
             }
-            return removeOldStats(staleStats);
         } else {
             Arrays.fill(mKernelWakelockBuffer, (byte) 0);
             int len = 0;
@@ -141,14 +144,17 @@ public class KernelWakelockReader {
                 }
             }
 
-            updateVersion(staleStats);
-            // Get native wakelock stats from SystemSuspend
-            if (getWakelockStatsFromSystemSuspend(staleStats) == null) {
-                Slog.w(TAG, "Failed to get Native wakelock stats from SystemSuspend");
+            // static read/write lock protection for sKernelWakelockUpdateVersion
+            synchronized (KernelWakelockReader.class) {
+                updateVersion(staleStats);
+                // Get native wakelock stats from SystemSuspend
+                if (getWakelockStatsFromSystemSuspend(staleStats) == null) {
+                    Slog.w(TAG, "Failed to get Native wakelock stats from SystemSuspend");
+                }
+                // Get kernel wakelock stats
+                parseProcWakelocks(mKernelWakelockBuffer, len, wakeup_sources, staleStats);
+                return removeOldStats(staleStats);
             }
-            // Get kernel wakelock stats
-            parseProcWakelocks(mKernelWakelockBuffer, len, wakeup_sources, staleStats);
-            return removeOldStats(staleStats);
         }
     }