infiniband: hw: hfi1: Change return type to vm_fault_t

Use new return type vm_fault_t for fault handler. For
now, this is just documenting that the function returns
a VM_FAULT value rather than an errno. Once all instances
are converted, vm_fault_t will become a distinct type.

Reference id -> 1c8f422059ae ("mm: change return type to
vm_fault_t")

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/file_ops.c

@@ -110,7 +110,7 @@ static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg);
 static int ctxt_reset(struct hfi1_ctxtdata *uctxt);
 static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
 		       unsigned long arg);
-static int vma_fault(struct vm_fault *vmf);
+static vm_fault_t vma_fault(struct vm_fault *vmf);
 static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
 			    unsigned long arg);
 
@@ -591,7 +591,7 @@ done:
  * Local (non-chip) user memory is not mapped right away but as it is
  * accessed by the user-level code.
  */
-static int vma_fault(struct vm_fault *vmf)
+static vm_fault_t vma_fault(struct vm_fault *vmf)
 {
 	struct page *page;