xen/swiotlb: Fix compile warnings when using plain integer instead of NULL pointer.

arch/x86/xen/pci-swiotlb-xen.c:96:1: warning: Using plain integer as NULL pointer
arch/x86/xen/pci-swiotlb-xen.c:96:1: warning: Using plain integer as NULL pointer

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c
index 2d58b3ff4fae..1ab45941502d 100644
--- a/arch/x86/xen/pci-swiotlb-xen.c
+++ b/arch/x86/xen/pci-swiotlb-xen.c
@@ -63,6 +63,6 @@ void __init pci_xen_swiotlb_init(void)
         }
 }
 IOMMU_INIT_FINISH(pci_xen_swiotlb_detect,
-                  0,
+                  NULL,
                   pci_xen_swiotlb_init,
-                  0);
+                  NULL);