diff --git a/src/core/kernel/qsharedmemory.cpp b/src/core/kernel/qsharedmemory.cpp
index 167736a12..a497e452f 100644
--- a/src/core/kernel/qsharedmemory.cpp
+++ b/src/core/kernel/qsharedmemory.cpp
@@ -57,9 +57,8 @@ QT_BEGIN_NAMESPACE
 
     On Unix this will be a file name
   */
-QString
-QSharedMemoryPrivate::makePlatformSafeKey(const QString &key,
-                                          const QString &prefix)
+QString QSharedMemoryPrivate::makePlatformSafeKey(const QString &key,
+                                                  const QString &prefix)
 {
     if (key.isEmpty())
         return QString();
@@ -407,7 +406,7 @@ bool QSharedMemory::attach(AccessMode mode)
 bool QSharedMemory::isAttached() const
 {
     Q_D(const QSharedMemory);
-    return (0 != d->memory);
+    return (d->memory != Q_NULLPTR);
 }
 
 /*!
diff --git a/src/core/kernel/qsharedmemory_p.h b/src/core/kernel/qsharedmemory_p.h
index a32bb3177..c0fb84a56 100644
--- a/src/core/kernel/qsharedmemory_p.h
+++ b/src/core/kernel/qsharedmemory_p.h
@@ -96,7 +96,7 @@ public:
     {
         if (q_sm && q_sm->lock())
             return true;
-        q_sm = 0;
+        q_sm = Q_NULLPTR;
         return false;
     }
 
diff --git a/src/core/kernel/qsharedmemory_unix.cpp b/src/core/kernel/qsharedmemory_unix.cpp
index 71f6d495f..e51c16a4e 100644
--- a/src/core/kernel/qsharedmemory_unix.cpp
+++ b/src/core/kernel/qsharedmemory_unix.cpp
@@ -302,7 +302,7 @@ bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode)
     // grab the memory
     memory = shmat(id, 0, (mode == QSharedMemory::ReadOnly ? SHM_RDONLY : 0));
     if ((void*) - 1 == memory) {
-        memory = 0;
+        memory = Q_NULLPTR;
         setErrorString(QLatin1String("QSharedMemory::attach (shmat)"));
         return false;
     }
@@ -348,11 +348,11 @@ bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode)
 
     // grab the memory
     int mprot = (mode == QSharedMemory::ReadOnly ? PROT_READ : PROT_READ | PROT_WRITE);
-    memory = mmap(0, size, mprot, MAP_SHARED, hand, 0);
+    memory = mmap(Q_NULLPTR, size, mprot, MAP_SHARED, hand, 0);
     if (memory == MAP_FAILED || !memory) {
         setErrorString(QLatin1String("QSharedMemory::attach (mmap)"));
         cleanHandle();
-        memory = 0;
+        memory = Q_NULLPTR;
         size = 0;
         return false;
     }
@@ -377,7 +377,7 @@ bool QSharedMemoryPrivate::detach()
         }
         return false;
     }
-    memory = 0;
+    memory = Q_NULLPTR;
     size = 0;
 
     // Get the number of current attachments
@@ -416,7 +416,7 @@ bool QSharedMemoryPrivate::detach()
         setErrorString(QLatin1String("QSharedMemory::detach (munmap)"));
         return false;
     }
-    memory = 0;
+    memory = Q_NULLPTR;
     size = 0;
 
     // get the number of current attachments
diff --git a/src/network/access/qnetworkdiskcache.cpp b/src/network/access/qnetworkdiskcache.cpp
index 11adbf76d..f72ec8178 100644
--- a/src/network/access/qnetworkdiskcache.cpp
+++ b/src/network/access/qnetworkdiskcache.cpp
@@ -288,8 +288,7 @@ void QNetworkDiskCachePrivate::storeItem(QCacheItem *cacheItem)
         currentCacheSize += 1024 + cacheItem->size();
     currentCacheSize = q->expire();
     if (!cacheItem->file) {
-        QString templateName = tmpCacheFileName();
-        cacheItem->file = new QTemporaryFile(templateName, &cacheItem->data);
+        cacheItem->file = new QTemporaryFile(tmpCacheFileName(), &cacheItem->data);
         if (cacheItem->file->open()) {
             cacheItem->writeHeader(cacheItem->file);
             cacheItem->writeCompressedData(cacheItem->file);