On Tue, 16 Feb 2016, tchalamarla at caviumnetworks.com wrote:

+#ifdef CONFIG_ARM64
+/* Due to ERRATA#22536, ThunderX need to handle
+ * HOST_IRQ_STAT differently.
+ * Work around is to make sure all pending IRQs
+ * are served before leaving handler
+ */
+static irqreturn_t ahci_thunderx_irq_handler(int irq, void *dev_instance)
+{
+	struct ata_host *host = dev_instance;
+	struct ahci_host_priv *hpriv;
+	unsigned int rc = 0;
+	void __iomem *mmio;
+	u32 irq_stat, irq_masked;
+	unsigned int handled = 1;
+
+	VPRINTK("ENTER\n");

Come on. This VPRINK stuff is really pointless. Enable irq tracepoints, they
already track the enter/exit of interrupt handlers ....

Thanks,

	tglx