diff --git a/include/ui/GraphicBuffer.h b/include/ui/GraphicBuffer.h
index b973c40..3cf628c 100644
--- a/include/ui/GraphicBuffer.h
+++ b/include/ui/GraphicBuffer.h
@@ -97,11 +97,6 @@
     status_t lockYCbCr(uint32_t usage, android_ycbcr *ycbcr);
     status_t lockYCbCr(uint32_t usage, const Rect& rect, android_ycbcr *ycbcr);
     status_t unlock();
-    status_t lockAsync(uint32_t usage, void** vaddr, int fenceFd);
-    status_t lockAsync(uint32_t usage, const Rect& rect, void** vaddr, int fenceFd);
-    status_t lockAsyncYCbCr(uint32_t usage, android_ycbcr *ycbcr, int fenceFd);
-    status_t lockAsyncYCbCr(uint32_t usage, const Rect& rect, android_ycbcr *ycbcr, int fenceFd);
-    status_t unlockAsync(int *fenceFd);
 
     ANativeWindowBuffer* getNativeBuffer() const;
 
diff --git a/include/ui/GraphicBufferMapper.h b/include/ui/GraphicBufferMapper.h
index 98fff0e..99d8723 100644
--- a/include/ui/GraphicBufferMapper.h
+++ b/include/ui/GraphicBufferMapper.h
@@ -49,14 +49,6 @@
             int usage, const Rect& bounds, android_ycbcr *ycbcr);
 
     status_t unlock(buffer_handle_t handle);
-
-    status_t lockAsync(buffer_handle_t handle,
-            int usage, const Rect& bounds, void** vaddr, int fenceFd);
-
-    status_t lockAsyncYCbCr(buffer_handle_t handle,
-            int usage, const Rect& bounds, android_ycbcr *ycbcr, int fenceFd);
-
-    status_t unlockAsync(buffer_handle_t handle, int *fenceFd);
     
     // dumps information about the mapping of this handle
     void dump(buffer_handle_t handle);
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 21ffc06..27dbc4e 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -740,6 +740,15 @@
     ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
     if (err == NO_ERROR) {
         sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
+        sp<Fence> fence(new Fence(fenceFd));
+
+        err = fence->waitForever("Surface::lock");
+        if (err != OK) {
+            ALOGE("Fence::wait failed (%s)", strerror(-err));
+            cancelBuffer(out, fenceFd);
+            return err;
+        }
+
         const Rect bounds(backBuffer->width, backBuffer->height);
 
         Region newDirtyRegion;
@@ -790,9 +799,9 @@
         }
 
         void* vaddr;
-        status_t res = backBuffer->lockAsync(
+        status_t res = backBuffer->lock(
                 GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
-                newDirtyRegion.bounds(), &vaddr, fenceFd);
+                newDirtyRegion.bounds(), &vaddr);
 
         ALOGW_IF(res, "failed locking buffer (handle = %p)",
                 backBuffer->handle);
@@ -818,11 +827,10 @@
         return INVALID_OPERATION;
     }
 
-    int fd = -1;
-    status_t err = mLockedBuffer->unlockAsync(&fd);
+    status_t err = mLockedBuffer->unlock();
     ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
 
-    err = queueBuffer(mLockedBuffer.get(), fd);
+    err = queueBuffer(mLockedBuffer.get(), -1);
     ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
             mLockedBuffer->handle, strerror(-err));
 
diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index 708888e..c4e4efa 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -200,52 +200,6 @@
     return res;
 }
 
-status_t GraphicBuffer::lockAsync(uint32_t usage, void** vaddr, int fenceFd)
-{
-    const Rect lockBounds(width, height);
-    status_t res = lockAsync(usage, lockBounds, vaddr, fenceFd);
-    return res;
-}
-
-status_t GraphicBuffer::lockAsync(uint32_t usage, const Rect& rect, void** vaddr, int fenceFd)
-{
-    if (rect.left < 0 || rect.right  > this->width ||
-        rect.top  < 0 || rect.bottom > this->height) {
-        ALOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
-                rect.left, rect.top, rect.right, rect.bottom,
-                this->width, this->height);
-        return BAD_VALUE;
-    }
-    status_t res = getBufferMapper().lockAsync(handle, usage, rect, vaddr, fenceFd);
-    return res;
-}
-
-status_t GraphicBuffer::lockAsyncYCbCr(uint32_t usage, android_ycbcr *ycbcr, int fenceFd)
-{
-    const Rect lockBounds(width, height);
-    status_t res = lockAsyncYCbCr(usage, lockBounds, ycbcr, fenceFd);
-    return res;
-}
-
-status_t GraphicBuffer::lockAsyncYCbCr(uint32_t usage, const Rect& rect, android_ycbcr *ycbcr, int fenceFd)
-{
-    if (rect.left < 0 || rect.right  > this->width ||
-        rect.top  < 0 || rect.bottom > this->height) {
-        ALOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
-                rect.left, rect.top, rect.right, rect.bottom,
-                this->width, this->height);
-        return BAD_VALUE;
-    }
-    status_t res = getBufferMapper().lockAsyncYCbCr(handle, usage, rect, ycbcr, fenceFd);
-    return res;
-}
-
-status_t GraphicBuffer::unlockAsync(int *fenceFd)
-{
-    status_t res = getBufferMapper().unlockAsync(handle, fenceFd);
-    return res;
-}
-
 size_t GraphicBuffer::getFlattenedSize() const {
     return (8 + (handle ? handle->numInts : 0))*sizeof(int);
 }
diff --git a/libs/ui/GraphicBufferMapper.cpp b/libs/ui/GraphicBufferMapper.cpp
index 320b6c0..a4cfce2 100644
--- a/libs/ui/GraphicBufferMapper.cpp
+++ b/libs/ui/GraphicBufferMapper.cpp
@@ -20,8 +20,6 @@
 #include <stdint.h>
 #include <errno.h>
 
-#include <sync/sync.h>
-
 #include <utils/Errors.h>
 #include <utils/Log.h>
 #include <utils/Trace.h>
@@ -111,65 +109,5 @@
     return err;
 }
 
-status_t GraphicBufferMapper::lockAsync(buffer_handle_t handle,
-        int usage, const Rect& bounds, void** vaddr, int fenceFd)
-{
-    ATRACE_CALL();
-    status_t err;
-
-    if (mAllocMod->common.module_api_version >= GRALLOC_MODULE_API_VERSION_0_3) {
-        err = mAllocMod->lockAsync(mAllocMod, handle, usage,
-                bounds.left, bounds.top, bounds.width(), bounds.height(),
-                vaddr, fenceFd);
-    } else {
-        sync_wait(fenceFd, -1);
-        close(fenceFd);
-        err = mAllocMod->lock(mAllocMod, handle, usage,
-                bounds.left, bounds.top, bounds.width(), bounds.height(),
-                vaddr);
-    }
-
-    ALOGW_IF(err, "lockAsync(...) failed %d (%s)", err, strerror(-err));
-    return err;
-}
-
-status_t GraphicBufferMapper::lockAsyncYCbCr(buffer_handle_t handle,
-        int usage, const Rect& bounds, android_ycbcr *ycbcr, int fenceFd)
-{
-    ATRACE_CALL();
-    status_t err;
-
-    if (mAllocMod->common.module_api_version >= GRALLOC_MODULE_API_VERSION_0_3) {
-        err = mAllocMod->lockAsync_ycbcr(mAllocMod, handle, usage,
-                bounds.left, bounds.top, bounds.width(), bounds.height(),
-                ycbcr, fenceFd);
-    } else {
-        sync_wait(fenceFd, -1);
-        close(fenceFd);
-        err = mAllocMod->lock_ycbcr(mAllocMod, handle, usage,
-                bounds.left, bounds.top, bounds.width(), bounds.height(),
-                ycbcr);
-    }
-
-    ALOGW_IF(err, "lock(...) failed %d (%s)", err, strerror(-err));
-    return err;
-}
-
-status_t GraphicBufferMapper::unlockAsync(buffer_handle_t handle, int *fenceFd)
-{
-    ATRACE_CALL();
-    status_t err;
-
-    if (mAllocMod->common.module_api_version >= GRALLOC_MODULE_API_VERSION_0_3) {
-        err = mAllocMod->unlockAsync(mAllocMod, handle, fenceFd);
-    } else {
-        *fenceFd = -1;
-        err = mAllocMod->unlock(mAllocMod, handle);
-    }
-
-    ALOGW_IF(err, "unlockAsync(...) failed %d (%s)", err, strerror(-err));
-    return err;
-}
-
 // ---------------------------------------------------------------------------
 }; // namespace android