diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index b25cd7b..8b074ad 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -40,7 +40,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#define DEFAULT_BINDER_VM_SIZE ((1 * 1024 * 1024) - sysconf(_SC_PAGE_SIZE) * 2)
+#define BINDER_VM_SIZE ((1 * 1024 * 1024) - sysconf(_SC_PAGE_SIZE) * 2)
 #define DEFAULT_MAX_BINDER_THREADS 15
 
 #ifdef __ANDROID_VNDK__
@@ -77,13 +77,7 @@
     if (gProcess != nullptr) {
         return gProcess;
     }
-    gProcess = new ProcessState(kDefaultDriver, DEFAULT_BINDER_VM_SIZE);
-    return gProcess;
-}
-
-sp<ProcessState> ProcessState::selfOrNull()
-{
-    Mutex::Autolock _l(gProcessMutex);
+    gProcess = new ProcessState(kDefaultDriver);
     return gProcess;
 }
 
@@ -104,19 +98,13 @@
         driver = "/dev/binder";
     }
 
-    gProcess = new ProcessState(driver, DEFAULT_BINDER_VM_SIZE);
+    gProcess = new ProcessState(driver);
     return gProcess;
 }
 
-sp<ProcessState> ProcessState::initWithMmapSize(size_t mmap_size) {
+sp<ProcessState> ProcessState::selfOrNull()
+{
     Mutex::Autolock _l(gProcessMutex);
-    if (gProcess != nullptr) {
-        LOG_ALWAYS_FATAL_IF(mmap_size != gProcess->getMmapSize(),
-                "ProcessState already initialized with a different mmap size.");
-        return gProcess;
-    }
-
-    gProcess = new ProcessState(kDefaultDriver, mmap_size);
     return gProcess;
 }
 
@@ -249,10 +237,6 @@
     return count;
 }
 
-size_t ProcessState::getMmapSize() {
-    return mMmapSize;
-}
-
 void ProcessState::setCallRestriction(CallRestriction restriction) {
     LOG_ALWAYS_FATAL_IF(IPCThreadState::selfOrNull(), "Call restrictions must be set before the threadpool is started.");
 
@@ -437,7 +421,7 @@
     return fd;
 }
 
-ProcessState::ProcessState(const char *driver, size_t mmap_size)
+ProcessState::ProcessState(const char *driver)
     : mDriverName(String8(driver))
     , mDriverFD(open_driver(driver))
     , mVMStart(MAP_FAILED)
@@ -451,12 +435,11 @@
     , mBinderContextUserData(nullptr)
     , mThreadPoolStarted(false)
     , mThreadPoolSeq(1)
-    , mMmapSize(mmap_size)
     , mCallRestriction(CallRestriction::NONE)
 {
     if (mDriverFD >= 0) {
         // mmap the binder, providing a chunk of virtual address space to receive transactions.
-        mVMStart = mmap(nullptr, mMmapSize, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0);
+        mVMStart = mmap(nullptr, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0);
         if (mVMStart == MAP_FAILED) {
             // *sigh*
             ALOGE("Using %s failed: unable to mmap transaction memory.\n", mDriverName.c_str());
@@ -473,7 +456,7 @@
 {
     if (mDriverFD >= 0) {
         if (mVMStart != MAP_FAILED) {
-            munmap(mVMStart, mMmapSize);
+            munmap(mVMStart, BINDER_VM_SIZE);
         }
         close(mDriverFD);
     }
diff --git a/libs/binder/include/binder/ProcessState.h b/libs/binder/include/binder/ProcessState.h
index 1622ba2..61bd69d 100644
--- a/libs/binder/include/binder/ProcessState.h
+++ b/libs/binder/include/binder/ProcessState.h
@@ -36,8 +36,6 @@
 public:
     static  sp<ProcessState>    self();
     static  sp<ProcessState>    selfOrNull();
-    // Note: don't call self() or selfOrNull() before initWithMmapSize()
-    static  sp<ProcessState>    initWithMmapSize(size_t mmapSize); // size in bytes
 
     /* initWithDriver() can be used to configure libbinder to use
      * a different binder driver dev node. It must be called *before*
@@ -78,7 +76,6 @@
             String8             getDriverName();
 
             ssize_t             getKernelReferences(size_t count, uintptr_t* buf);
-            size_t              getMmapSize();
 
             enum class CallRestriction {
                 // all calls okay
@@ -95,7 +92,7 @@
 private:
     friend class IPCThreadState;
     
-            explicit            ProcessState(const char* driver, size_t mmap_size);
+            explicit            ProcessState(const char* driver);
                                 ~ProcessState();
 
                                 ProcessState(const ProcessState& o);
@@ -140,7 +137,6 @@
             String8             mRootDir;
             bool                mThreadPoolStarted;
     volatile int32_t            mThreadPoolSeq;
-            const size_t        mMmapSize;
 
             CallRestriction     mCallRestriction;
 };