diff --git a/src/core/io/qfile.cpp b/src/core/io/qfile.cpp
index 391400cef..45f14d3df 100644
--- a/src/core/io/qfile.cpp
+++ b/src/core/io/qfile.cpp
@@ -50,7 +50,7 @@ QT_BEGIN_NAMESPACE
 //************* QFilePrivate
 QFilePrivate::QFilePrivate()
     : fileEngine(0), lastWasWrite(false),
-      error(QFile::NoError), cachedSize(0)
+      error(QFile::NoError)
 {
 }
 
@@ -1067,10 +1067,8 @@ bool QFile::resize(qint64 sz)
         seek(sz);
     if(d->fileEngine->setSize(sz)) {
         unsetError();
-        d->cachedSize = sz;
         return true;
     }
-    d->cachedSize = 0;
     d->setError(QFile::ResizeError, d->fileEngine->errorString());
     return false;
 }
@@ -1225,8 +1223,7 @@ qint64 QFile::size() const
     Q_D(const QFile);
     if (!d->ensureFlushed())
         return 0;
-    d->cachedSize = fileEngine()->size();
-    return d->cachedSize;
+    return fileEngine()->size();
 }
 
 /*!
@@ -1260,11 +1257,6 @@ bool QFile::atEnd() const
         return d->fileEngine->atEnd();
     }
 
-    // if it looks like we are at the end, or if size is not cached,
-    // fall through to bytesAvailable() to make sure.
-    if (pos() < d->cachedSize)
-        return false;
-
     // Fall back to checking how much is available (will stat files).
     return bytesAvailable() == 0;
 }
@@ -1328,11 +1320,6 @@ qint64 QFile::readLineData(char *data, qint64 maxlen)
         read = QIODevice::readLineData(data, maxlen);
     }
 
-    if (read < maxlen) {
-        // failed to read all requested, may be at the end of file, stop caching size so that it's rechecked
-        d->cachedSize = 0;
-    }
-
     return read;
 }
 
@@ -1354,11 +1341,6 @@ qint64 QFile::readData(char *data, qint64 len)
         d->setError(err, d->fileEngine->errorString());
     }
 
-    if (read < len) {
-        // failed to read all requested, may be at the end of file, stop caching size so that it's rechecked
-        d->cachedSize = 0;
-    }
-
     return read;
 }
 
diff --git a/src/core/io/qfile_p.h b/src/core/io/qfile_p.h
index f0e78345b..e72e7932f 100644
--- a/src/core/io/qfile_p.h
+++ b/src/core/io/qfile_p.h
@@ -74,8 +74,6 @@ protected:
     QFile::FileError error;
     void setError(QFile::FileError err);
     void setError(QFile::FileError err, const QString &errorString);
-
-    mutable qint64 cachedSize;
 };
 
 QT_END_NAMESPACE