vfio: fix build with Linux < 4.0

drivers/bus/pci/linux/pci_vfio.c:45:23: error:
‘failure_handle_lock’ defined but not used

Fixes: 8ffe73865124 ("vfio: add lock for hot-unplug failure handler")

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>

diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c
index d2c8410..ffd26f1 100644 (file)
--- a/drivers/bus/pci/linux/pci_vfio.c
+++ b/drivers/bus/pci/linux/pci_vfio.c
@@ -36,14 +36,6 @@
  * This file is only compiled if CONFIG_RTE_EAL_VFIO is set to "y".
  */
 
-/*
- * spinlock for device hot-unplug failure handling. If it try to access bus or
- * device, such as handle sigbus on bus or handle memory failure for device
- * just need to use this lock. It could protect the bus and the device to avoid
- * race condition.
- */
-static rte_spinlock_t failure_handle_lock = RTE_SPINLOCK_INITIALIZER;
-
 #ifdef VFIO_PRESENT
 
 #ifndef PAGE_SIZE
@@ -291,6 +283,14 @@ pci_vfio_setup_interrupts(struct rte_pci_device *dev, int vfio_dev_fd)
 }
 
 #ifdef HAVE_VFIO_DEV_REQ_INTERFACE
+/*
+ * Spinlock for device hot-unplug failure handling.
+ * If it tries to access bus or device, such as handle sigbus on bus
+ * or handle memory failure for device, just need to use this lock.
+ * It could protect the bus and the device to avoid race condition.
+ */
+static rte_spinlock_t failure_handle_lock = RTE_SPINLOCK_INITIALIZER;
+
 static void
 pci_vfio_req_handler(void *param)
 {