10 files changed, 20 insertions, 20 deletions
diff --git a/src/corelib/doc/snippets/qsignalmapper/buttonwidget.cpp b/src/corelib/doc/snippets/qsignalmapper/buttonwidget.cpp
index 230be1f524..067853a5f6 100644
--- a/src/corelib/doc/snippets/qsignalmapper/buttonwidget.cpp
+++ b/src/corelib/doc/snippets/qsignalmapper/buttonwidget.cpp
@@ -43,7 +43,7 @@
 #include "buttonwidget.h"
 
 //! [0]
-ButtonWidget::ButtonWidget(QStringList texts, QWidget *parent)
+ButtonWidget::ButtonWidget(const QStringList &texts, QWidget *parent)
     : QWidget(parent)
 {
     signalMapper = new QSignalMapper(this);
diff --git a/src/corelib/doc/snippets/qsignalmapper/buttonwidget.h b/src/corelib/doc/snippets/qsignalmapper/buttonwidget.h
index a6939603e8..b1803cf203 100644
--- a/src/corelib/doc/snippets/qsignalmapper/buttonwidget.h
+++ b/src/corelib/doc/snippets/qsignalmapper/buttonwidget.h
@@ -53,7 +53,7 @@ class ButtonWidget : public QWidget
     Q_OBJECT
 
 public:
-    ButtonWidget(QStringList texts, QWidget *parent = 0);
+    ButtonWidget(const QStringList &texts, QWidget *parent = 0);
 
 signals:
     void clicked(const QString &text);
diff --git a/src/corelib/doc/snippets/sharedemployee/employee.h b/src/corelib/doc/snippets/sharedemployee/employee.h
index 9b673dceeb..83f630d299 100644
--- a/src/corelib/doc/snippets/sharedemployee/employee.h
+++ b/src/corelib/doc/snippets/sharedemployee/employee.h
@@ -63,7 +63,7 @@ class Employee
 //! [1]
     Employee() { d = new EmployeeData; }
 //! [1] //! [2]
-    Employee(int id, QString name) {
+    Employee(int id, const QString &name) {
         d = new EmployeeData;
         setId(id);
         setName(name);
@@ -77,7 +77,7 @@ class Employee
 //! [3]
     void setId(int id) { d->id = id; }
 //! [3] //! [4]
-    void setName(QString name) { d->name = name; }
+    void setName(const QString &name) { d->name = name; }
 //! [4]
 
 //! [5]
diff --git a/src/corelib/io/qfilesystemwatcher_fsevents.mm b/src/corelib/io/qfilesystemwatcher_fsevents.mm
index 1dc45a7e41..1076b8f5b4 100644
--- a/src/corelib/io/qfilesystemwatcher_fsevents.mm
+++ b/src/corelib/io/qfilesystemwatcher_fsevents.mm
@@ -283,13 +283,13 @@ void QFseventsFileSystemWatcherEngine::processEvent(ConstFSEventStreamRef stream
 #endif
 }
 
-void QFseventsFileSystemWatcherEngine::doEmitFileChanged(const QString path, bool removed)
+void QFseventsFileSystemWatcherEngine::doEmitFileChanged(const QString &path, bool removed)
 {
     DEBUG() << "emitting fileChanged for" << path << "with removed =" << removed;
     emit fileChanged(path, removed);
 }
 
-void QFseventsFileSystemWatcherEngine::doEmitDirectoryChanged(const QString path, bool removed)
+void QFseventsFileSystemWatcherEngine::doEmitDirectoryChanged(const QString &path, bool removed)
 {
     DEBUG() << "emitting directoryChanged for" << path << "with removed =" << removed;
     emit directoryChanged(path, removed);
@@ -316,10 +316,10 @@ QFseventsFileSystemWatcherEngine::QFseventsFileSystemWatcherEngine(QObject *pare
 
     // We cannot use signal-to-signal queued connections, because the
     // QSignalSpy cannot spot signals fired from other/alien threads.
-    connect(this, SIGNAL(emitDirectoryChanged(const QString, bool)),
-            this, SLOT(doEmitDirectoryChanged(const QString, bool)), Qt::QueuedConnection);
-    connect(this, SIGNAL(emitFileChanged(const QString, bool)),
-            this, SLOT(doEmitFileChanged(const QString, bool)), Qt::QueuedConnection);
+    connect(this, SIGNAL(emitDirectoryChanged(QString,bool)),
+            this, SLOT(doEmitDirectoryChanged(QString,bool)), Qt::QueuedConnection);
+    connect(this, SIGNAL(emitFileChanged(QString,bool)),
+            this, SLOT(doEmitFileChanged(QString,bool)), Qt::QueuedConnection);
     connect(this, SIGNAL(scheduleStreamRestart()),
             this, SLOT(restartStream()), Qt::QueuedConnection);
 
diff --git a/src/corelib/io/qfilesystemwatcher_fsevents_p.h b/src/corelib/io/qfilesystemwatcher_fsevents_p.h
index bd75a0aa32..b4640afc4e 100644
--- a/src/corelib/io/qfilesystemwatcher_fsevents_p.h
+++ b/src/corelib/io/qfilesystemwatcher_fsevents_p.h
@@ -74,13 +74,13 @@ public:
     void processEvent(ConstFSEventStreamRef streamRef, size_t numEvents, char **eventPaths, const FSEventStreamEventFlags eventFlags[], const FSEventStreamEventId eventIds[]);
 
 Q_SIGNALS:
-    void emitFileChanged(const QString path, bool removed);
-    void emitDirectoryChanged(const QString path, bool removed);
+    void emitFileChanged(const QString &path, bool removed);
+    void emitDirectoryChanged(const QString &path, bool removed);
     void scheduleStreamRestart();
 
 private slots:
-    void doEmitFileChanged(const QString path, bool removed);
-    void doEmitDirectoryChanged(const QString path, bool removed);
+    void doEmitFileChanged(const QString &path, bool removed);
+    void doEmitDirectoryChanged(const QString &path, bool removed);
     void restartStream();
 
 private:
diff --git a/src/corelib/io/qsettings_winrt.cpp b/src/corelib/io/qsettings_winrt.cpp
index 8f9d6d3692..bf8b157d00 100644
--- a/src/corelib/io/qsettings_winrt.cpp
+++ b/src/corelib/io/qsettings_winrt.cpp
@@ -281,7 +281,7 @@ class QWinRTSettingsPrivate : public QSettingsPrivate
 public:
     QWinRTSettingsPrivate(QSettings::Scope scope, const QString &organization,
                           const QString &application);
-    QWinRTSettingsPrivate(QString rKey);
+    QWinRTSettingsPrivate(const QString &rKey);
     ~QWinRTSettingsPrivate();
 
     void remove(const QString &uKey);
@@ -315,7 +315,7 @@ QWinRTSettingsPrivate::QWinRTSettingsPrivate(QSettings::Scope scope, const QStri
     init(scope);
 }
 
-QWinRTSettingsPrivate::QWinRTSettingsPrivate(QString rPath)
+QWinRTSettingsPrivate::QWinRTSettingsPrivate(const QString &rPath)
     : QSettingsPrivate(QSettings::NativeFormat, QSettings::UserScope, rPath, QString())
     , writeContainer(0)
 {
diff --git a/src/corelib/itemmodels/qabstractitemmodel.cpp b/src/corelib/itemmodels/qabstractitemmodel.cpp
index 213394e4b7..60ac75133c 100644
--- a/src/corelib/itemmodels/qabstractitemmodel.cpp
+++ b/src/corelib/itemmodels/qabstractitemmodel.cpp
@@ -677,7 +677,7 @@ void QAbstractItemModelPrivate::itemsAboutToBeMoved(const QModelIndex &srcParent
   column value depending on the value of \a orientation. The indexes may also be moved to a different parent if \a parent
   differs from the existing parent for the index.
 */
-void QAbstractItemModelPrivate::movePersistentIndexes(QVector<QPersistentModelIndexData *> indexes, int change, const QModelIndex &parent, Qt::Orientation orientation)
+void QAbstractItemModelPrivate::movePersistentIndexes(const QVector<QPersistentModelIndexData *> &indexes, int change, const QModelIndex &parent, Qt::Orientation orientation)
 {
     QVector<QPersistentModelIndexData *>::const_iterator it;
     const QVector<QPersistentModelIndexData *>::const_iterator begin = indexes.constBegin();
diff --git a/src/corelib/itemmodels/qabstractitemmodel_p.h b/src/corelib/itemmodels/qabstractitemmodel_p.h
index 1ff758f7ce..075e6a9018 100644
--- a/src/corelib/itemmodels/qabstractitemmodel_p.h
+++ b/src/corelib/itemmodels/qabstractitemmodel_p.h
@@ -72,7 +72,7 @@ class Q_CORE_EXPORT QAbstractItemModelPrivate : public QObjectPrivate
 public:
     QAbstractItemModelPrivate() : QObjectPrivate(), supportedDragActions(-1), roleNames(defaultRoleNames()) {}
     void removePersistentIndexData(QPersistentModelIndexData *data);
-    void movePersistentIndexes(QVector<QPersistentModelIndexData *> indexes, int change, const QModelIndex &parent, Qt::Orientation orientation);
+    void movePersistentIndexes(const QVector<QPersistentModelIndexData *> &indexes, int change, const QModelIndex &parent, Qt::Orientation orientation);
     void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last);
     void rowsInserted(const QModelIndex &parent, int first, int last);
     void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
diff --git a/src/corelib/kernel/qsharedmemory_p.h b/src/corelib/kernel/qsharedmemory_p.h
index 8c5cf52b9f..0308dde57f 100644
--- a/src/corelib/kernel/qsharedmemory_p.h
+++ b/src/corelib/kernel/qsharedmemory_p.h
@@ -136,7 +136,7 @@ public:
     void setErrorString(const QString &function);
 
 #ifndef QT_NO_SYSTEMSEMAPHORE
-    bool tryLocker(QSharedMemoryLocker *locker, const QString function) {
+    bool tryLocker(QSharedMemoryLocker *locker, const QString &function) {
         if (!locker->lock()) {
             errorString = QSharedMemory::tr("%1: unable to lock").arg(function);
             error = QSharedMemory::LockError;
diff --git a/src/corelib/tools/qtimezoneprivate_tz.cpp b/src/corelib/tools/qtimezoneprivate_tz.cpp
index 74499bf52f..0d8ae3b47f 100644
--- a/src/corelib/tools/qtimezoneprivate_tz.cpp
+++ b/src/corelib/tools/qtimezoneprivate_tz.cpp
@@ -343,7 +343,7 @@ static QDate calculateDowDate(int year, int month, int dayOfWeek, int week)
     return date;
 }
 
-static QDate calculatePosixDate(const QByteArray dateRule, int year)
+static QDate calculatePosixDate(const QByteArray &dateRule, int year)
 {
     // Can start with M, J, or a digit
     if (dateRule.at(0) == 'M') {