diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 9f8c408..764e6c3 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -93,7 +93,7 @@
     BLOB_ASHMEM_MUTABLE = 2,
 };
 
-void acquire_object(const sp<ProcessState>& proc,
+static void acquire_object(const sp<ProcessState>& proc,
     const flat_binder_object& obj, const void* who, size_t* outAshmemSize)
 {
     switch (obj.hdr.type) {
@@ -135,12 +135,6 @@
     ALOGD("Invalid object type 0x%08x", obj.hdr.type);
 }
 
-void acquire_object(const sp<ProcessState>& proc,
-    const flat_binder_object& obj, const void* who)
-{
-    acquire_object(proc, obj, who, nullptr);
-}
-
 static void release_object(const sp<ProcessState>& proc,
     const flat_binder_object& obj, const void* who, size_t* outAshmemSize)
 {
@@ -189,19 +183,13 @@
     ALOGE("Invalid object type 0x%08x", obj.hdr.type);
 }
 
-void release_object(const sp<ProcessState>& proc,
-    const flat_binder_object& obj, const void* who)
-{
-    release_object(proc, obj, who, nullptr);
-}
-
 inline static status_t finish_flatten_binder(
     const sp<IBinder>& /*binder*/, const flat_binder_object& flat, Parcel* out)
 {
     return out->writeObject(flat, false);
 }
 
-status_t flatten_binder(const sp<ProcessState>& /*proc*/,
+static status_t flatten_binder(const sp<ProcessState>& /*proc*/,
     const sp<IBinder>& binder, Parcel* out)
 {
     flat_binder_object obj;
@@ -243,7 +231,7 @@
     return finish_flatten_binder(binder, obj, out);
 }
 
-status_t flatten_binder(const sp<ProcessState>& /*proc*/,
+static status_t flatten_binder(const sp<ProcessState>& /*proc*/,
     const wp<IBinder>& binder, Parcel* out)
 {
     flat_binder_object obj;
@@ -299,7 +287,7 @@
     return NO_ERROR;
 }
 
-status_t unflatten_binder(const sp<ProcessState>& proc,
+static status_t unflatten_binder(const sp<ProcessState>& proc,
     const Parcel& in, sp<IBinder>* out)
 {
     const flat_binder_object* flat = in.readObject(false);
@@ -318,7 +306,7 @@
     return BAD_TYPE;
 }
 
-status_t unflatten_binder(const sp<ProcessState>& proc,
+static status_t unflatten_binder(const sp<ProcessState>& proc,
     const Parcel& in, wp<IBinder>* out)
 {
     const flat_binder_object* flat = in.readObject(false);