diff --git a/libs/gui/BufferItemConsumer.cpp b/libs/gui/BufferItemConsumer.cpp
index 578b8d9..6f4c89d 100644
--- a/libs/gui/BufferItemConsumer.cpp
+++ b/libs/gui/BufferItemConsumer.cpp
@@ -78,7 +78,7 @@
         }
     }
 
-    item->mGraphicBuffer = mSlots[item->mBuf].mGraphicBuffer;
+    item->mGraphicBuffer = mSlots[item->mSlot].mGraphicBuffer;
 
     return OK;
 }
@@ -89,9 +89,9 @@
 
     Mutex::Autolock _l(mMutex);
 
-    err = addReleaseFenceLocked(item.mBuf, item.mGraphicBuffer, releaseFence);
+    err = addReleaseFenceLocked(item.mSlot, item.mGraphicBuffer, releaseFence);
 
-    err = releaseBufferLocked(item.mBuf, item.mGraphicBuffer, EGL_NO_DISPLAY,
+    err = releaseBufferLocked(item.mSlot, item.mGraphicBuffer, EGL_NO_DISPLAY,
             EGL_NO_SYNC_KHR);
     if (err != OK) {
         BI_LOGE("Failed to release buffer: %s (%d)",
diff --git a/libs/gui/ConsumerBase.cpp b/libs/gui/ConsumerBase.cpp
index 04ab06b..d01187f 100644
--- a/libs/gui/ConsumerBase.cpp
+++ b/libs/gui/ConsumerBase.cpp
@@ -239,14 +239,14 @@
     }
 
     if (item->mGraphicBuffer != NULL) {
-        mSlots[item->mBuf].mGraphicBuffer = item->mGraphicBuffer;
+        mSlots[item->mSlot].mGraphicBuffer = item->mGraphicBuffer;
     }
 
-    mSlots[item->mBuf].mFrameNumber = item->mFrameNumber;
-    mSlots[item->mBuf].mFence = item->mFence;
+    mSlots[item->mSlot].mFrameNumber = item->mFrameNumber;
+    mSlots[item->mSlot].mFence = item->mFence;
 
     CB_LOGV("acquireBufferLocked: -> slot=%d/%" PRIu64,
-            item->mBuf, item->mFrameNumber);
+            item->mSlot, item->mFrameNumber);
 
     return OK;
 }
diff --git a/libs/gui/CpuConsumer.cpp b/libs/gui/CpuConsumer.cpp
index e29b740..7ed3d0f 100644
--- a/libs/gui/CpuConsumer.cpp
+++ b/libs/gui/CpuConsumer.cpp
@@ -106,22 +106,22 @@
         }
     }
 
-    int buf = b.mBuf;
+    int slot = b.mSlot;
 
     void *bufferPointer = NULL;
     android_ycbcr ycbcr = android_ycbcr();
 
-    PixelFormat format = mSlots[buf].mGraphicBuffer->getPixelFormat();
+    PixelFormat format = mSlots[slot].mGraphicBuffer->getPixelFormat();
     PixelFormat flexFormat = format;
     if (isPossiblyYUV(format)) {
         if (b.mFence.get()) {
-            err = mSlots[buf].mGraphicBuffer->lockAsyncYCbCr(
+            err = mSlots[slot].mGraphicBuffer->lockAsyncYCbCr(
                 GraphicBuffer::USAGE_SW_READ_OFTEN,
                 b.mCrop,
                 &ycbcr,
                 b.mFence->dup());
         } else {
-            err = mSlots[buf].mGraphicBuffer->lockYCbCr(
+            err = mSlots[slot].mGraphicBuffer->lockYCbCr(
                 GraphicBuffer::USAGE_SW_READ_OFTEN,
                 b.mCrop,
                 &ycbcr);
@@ -141,13 +141,13 @@
 
     if (bufferPointer == NULL) { // not flexible YUV
         if (b.mFence.get()) {
-            err = mSlots[buf].mGraphicBuffer->lockAsync(
+            err = mSlots[slot].mGraphicBuffer->lockAsync(
                 GraphicBuffer::USAGE_SW_READ_OFTEN,
                 b.mCrop,
                 &bufferPointer,
                 b.mFence->dup());
         } else {
-            err = mSlots[buf].mGraphicBuffer->lock(
+            err = mSlots[slot].mGraphicBuffer->lock(
                 GraphicBuffer::USAGE_SW_READ_OFTEN,
                 b.mCrop,
                 &bufferPointer);
@@ -169,19 +169,19 @@
     assert(lockedIdx < mMaxLockedBuffers);
 
     AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
-    ab.mSlot = buf;
+    ab.mSlot = slot;
     ab.mBufferPointer = bufferPointer;
-    ab.mGraphicBuffer = mSlots[buf].mGraphicBuffer;
+    ab.mGraphicBuffer = mSlots[slot].mGraphicBuffer;
 
     nativeBuffer->data   =
             reinterpret_cast<uint8_t*>(bufferPointer);
-    nativeBuffer->width  = mSlots[buf].mGraphicBuffer->getWidth();
-    nativeBuffer->height = mSlots[buf].mGraphicBuffer->getHeight();
+    nativeBuffer->width  = mSlots[slot].mGraphicBuffer->getWidth();
+    nativeBuffer->height = mSlots[slot].mGraphicBuffer->getHeight();
     nativeBuffer->format = format;
     nativeBuffer->flexFormat = flexFormat;
     nativeBuffer->stride = (ycbcr.y != NULL) ?
             static_cast<uint32_t>(ycbcr.ystride) :
-            mSlots[buf].mGraphicBuffer->getStride();
+            mSlots[slot].mGraphicBuffer->getStride();
 
     nativeBuffer->crop        = b.mCrop;
     nativeBuffer->transform   = b.mTransform;
diff --git a/libs/gui/GLConsumer.cpp b/libs/gui/GLConsumer.cpp
index be5075c..bf34c6a 100644
--- a/libs/gui/GLConsumer.cpp
+++ b/libs/gui/GLConsumer.cpp
@@ -357,7 +357,7 @@
     // before, so any prior EglImage created is using a stale buffer. This
     // replaces any old EglImage with a new one (using the new buffer).
     if (item->mGraphicBuffer != NULL) {
-        int slot = item->mBuf;
+        int slot = item->mSlot;
         mEglSlots[slot].mEglImage = new EglImage(item->mGraphicBuffer);
     }
 
@@ -381,12 +381,12 @@
 {
     status_t err = NO_ERROR;
 
-    int buf = item.mBuf;
+    int slot = item.mSlot;
 
     if (!mAttached) {
         GLC_LOGE("updateAndRelease: GLConsumer is not attached to an OpenGL "
                 "ES context");
-        releaseBufferLocked(buf, mSlots[buf].mGraphicBuffer,
+        releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer,
                 mEglDisplay, EGL_NO_SYNC_KHR);
         return INVALID_OPERATION;
     }
@@ -394,7 +394,7 @@
     // Confirm state.
     err = checkAndUpdateEglStateLocked();
     if (err != NO_ERROR) {
-        releaseBufferLocked(buf, mSlots[buf].mGraphicBuffer,
+        releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer,
                 mEglDisplay, EGL_NO_SYNC_KHR);
         return err;
     }
@@ -404,11 +404,11 @@
     // ConsumerBase.
     // We may have to do this even when item.mGraphicBuffer == NULL (which
     // means the buffer was previously acquired).
-    err = mEglSlots[buf].mEglImage->createIfNeeded(mEglDisplay, item.mCrop);
+    err = mEglSlots[slot].mEglImage->createIfNeeded(mEglDisplay, item.mCrop);
     if (err != NO_ERROR) {
         GLC_LOGW("updateAndRelease: unable to createImage on display=%p slot=%d",
-                mEglDisplay, buf);
-        releaseBufferLocked(buf, mSlots[buf].mGraphicBuffer,
+                mEglDisplay, slot);
+        releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer,
                 mEglDisplay, EGL_NO_SYNC_KHR);
         return UNKNOWN_ERROR;
     }
@@ -420,7 +420,7 @@
         // release the old buffer, so instead we just drop the new frame.
         // As we are still under lock since acquireBuffer, it is safe to
         // release by slot.
-        releaseBufferLocked(buf, mSlots[buf].mGraphicBuffer,
+        releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer,
                 mEglDisplay, EGL_NO_SYNC_KHR);
         return err;
     }
@@ -428,7 +428,7 @@
     GLC_LOGV("updateAndRelease: (slot=%d buf=%p) -> (slot=%d buf=%p)",
             mCurrentTexture, mCurrentTextureImage != NULL ?
                     mCurrentTextureImage->graphicBufferHandle() : 0,
-            buf, mSlots[buf].mGraphicBuffer->handle);
+            slot, mSlots[slot].mGraphicBuffer->handle);
 
     // release old buffer
     if (mCurrentTexture != BufferQueue::INVALID_BUFFER_SLOT) {
@@ -444,8 +444,8 @@
     }
 
     // Update the GLConsumer state.
-    mCurrentTexture = buf;
-    mCurrentTextureImage = mEglSlots[buf].mEglImage;
+    mCurrentTexture = slot;
+    mCurrentTextureImage = mEglSlots[slot].mEglImage;
     mCurrentCrop = item.mCrop;
     mCurrentTransform = item.mTransform;
     mCurrentScalingMode = item.mScalingMode;
diff --git a/libs/gui/StreamSplitter.cpp b/libs/gui/StreamSplitter.cpp
index 43f9214..dce0e87 100644
--- a/libs/gui/StreamSplitter.cpp
+++ b/libs/gui/StreamSplitter.cpp
@@ -132,7 +132,7 @@
     ALOGV("acquired buffer %#" PRIx64 " from input",
             bufferItem.mGraphicBuffer->getId());
 
-    status = mInput->detachBuffer(bufferItem.mBuf);
+    status = mInput->detachBuffer(bufferItem.mSlot);
     LOG_ALWAYS_FATAL_IF(status != NO_ERROR,
             "detaching buffer from input failed (%d)", status);
 
diff --git a/libs/gui/tests/BufferQueue_test.cpp b/libs/gui/tests/BufferQueue_test.cpp
index 115e4db..e2bf6a0 100644
--- a/libs/gui/tests/BufferQueue_test.cpp
+++ b/libs/gui/tests/BufferQueue_test.cpp
@@ -288,8 +288,8 @@
     BufferItem item;
     ASSERT_EQ(OK, mConsumer->acquireBuffer(&item, static_cast<nsecs_t>(0)));
 
-    ASSERT_EQ(OK, mConsumer->detachBuffer(item.mBuf));
-    ASSERT_EQ(BAD_VALUE, mConsumer->detachBuffer(item.mBuf)); // Not acquired
+    ASSERT_EQ(OK, mConsumer->detachBuffer(item.mSlot));
+    ASSERT_EQ(BAD_VALUE, mConsumer->detachBuffer(item.mSlot)); // Not acquired
 
     uint32_t* dataIn;
     ASSERT_EQ(OK, item.mGraphicBuffer->lock(
@@ -348,7 +348,7 @@
 
     BufferItem item;
     ASSERT_EQ(OK, mConsumer->acquireBuffer(&item, static_cast<nsecs_t>(0)));
-    ASSERT_EQ(OK, mConsumer->detachBuffer(item.mBuf));
+    ASSERT_EQ(OK, mConsumer->detachBuffer(item.mSlot));
 
     int newSlot;
     ASSERT_EQ(OK, mProducer->attachBuffer(&newSlot, item.mGraphicBuffer));
diff --git a/libs/gui/tests/StreamSplitter_test.cpp b/libs/gui/tests/StreamSplitter_test.cpp
index 00cc39d..afd149e 100644
--- a/libs/gui/tests/StreamSplitter_test.cpp
+++ b/libs/gui/tests/StreamSplitter_test.cpp
@@ -128,7 +128,7 @@
     ASSERT_EQ(*dataOut, TEST_DATA);
     ASSERT_EQ(OK, item.mGraphicBuffer->unlock());
 
-    ASSERT_EQ(OK, outputConsumer->releaseBuffer(item.mBuf, item.mFrameNumber,
+    ASSERT_EQ(OK, outputConsumer->releaseBuffer(item.mSlot, item.mFrameNumber,
             EGL_NO_DISPLAY, EGL_NO_SYNC_KHR, Fence::NO_FENCE));
 
     ASSERT_EQ(IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION,
@@ -196,7 +196,7 @@
         ASSERT_EQ(*dataOut, TEST_DATA);
         ASSERT_EQ(OK, item.mGraphicBuffer->unlock());
 
-        ASSERT_EQ(OK, outputConsumers[output]->releaseBuffer(item.mBuf,
+        ASSERT_EQ(OK, outputConsumers[output]->releaseBuffer(item.mSlot,
                     item.mFrameNumber, EGL_NO_DISPLAY, EGL_NO_SYNC_KHR,
                     Fence::NO_FENCE));
     }
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
index 6ef3295..a143877 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
@@ -106,7 +106,7 @@
     // releaseBuffer call and we should be in the same state we'd be in if we
     // had released the old buffer first.
     if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT &&
-        item.mBuf != mCurrentBufferSlot) {
+        item.mSlot != mCurrentBufferSlot) {
         // Release the previous buffer.
         err = releaseBufferLocked(mCurrentBufferSlot, mCurrentBuffer,
                 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
@@ -115,7 +115,7 @@
             return err;
         }
     }
-    mCurrentBufferSlot = item.mBuf;
+    mCurrentBufferSlot = item.mSlot;
     mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer;
     outFence = item.mFence;
     outBuffer = mCurrentBuffer;
diff --git a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
index 3180d29..b2ff8b4 100644
--- a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
@@ -447,11 +447,11 @@
         result = acquireBufferLocked(&item, 0);
         if (result != NO_ERROR)
             return result;
-        VDS_LOGW_IF(item.mBuf != sslot,
+        VDS_LOGW_IF(item.mSlot != sslot,
                 "queueBuffer: acquired sslot %d from SCRATCH after queueing sslot %d",
-                item.mBuf, sslot);
-        mFbProducerSlot = mapSource2ProducerSlot(SOURCE_SCRATCH, item.mBuf);
-        mFbFence = mSlots[item.mBuf].mFence;
+                item.mSlot, sslot);
+        mFbProducerSlot = mapSource2ProducerSlot(SOURCE_SCRATCH, item.mSlot);
+        mFbFence = mSlots[item.mSlot].mFence;
 
     } else {
         LOG_FATAL_IF(mCompositionType != COMPOSITION_GLES,
diff --git a/services/surfaceflinger/SurfaceFlingerConsumer.cpp b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
index ed1f31b..930e7c7 100644
--- a/services/surfaceflinger/SurfaceFlingerConsumer.cpp
+++ b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
@@ -72,9 +72,9 @@
     // We call the rejecter here, in case the caller has a reason to
     // not accept this buffer.  This is used by SurfaceFlinger to
     // reject buffers which have the wrong size
-    int buf = item.mBuf;
-    if (rejecter && rejecter->reject(mSlots[buf].mGraphicBuffer, item)) {
-        releaseBufferLocked(buf, mSlots[buf].mGraphicBuffer, EGL_NO_SYNC_KHR);
+    int slot = item.mSlot;
+    if (rejecter && rejecter->reject(mSlots[slot].mGraphicBuffer, item)) {
+        releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer, EGL_NO_SYNC_KHR);
         return BUFFER_REJECTED;
     }