IB/ipath: Convert from .nopage to .fault

Signed-off-by: Nick Piggin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>

Author: Nick Piggin

drivers/infiniband/hw/ipath/ipath_debug.h

@@ -55,7 +55,7 @@
 #define __IPATH_PKTDBG      0x80	/* print packet data */
 /* print process startup (init)/exit messages */
 #define __IPATH_PROCDBG     0x100
-/* print mmap/nopage stuff, not using VDBG any more */
+/* print mmap/fault stuff, not using VDBG any more */
 #define __IPATH_MMDBG       0x200
 #define __IPATH_ERRPKTDBG   0x400
 #define __IPATH_USER_SEND   0x1000	/* use user mode send */
@@ -81,7 +81,7 @@
 #define __IPATH_VERBDBG   0x0	/* very verbose debug */
 #define __IPATH_PKTDBG    0x0	/* print packet data */
 #define __IPATH_PROCDBG   0x0	/* process startup (init)/exit messages */
-/* print mmap/nopage stuff, not using VDBG any more */
+/* print mmap/fault stuff, not using VDBG any more */
 #define __IPATH_MMDBG     0x0
 #define __IPATH_EPKTDBG   0x0	/* print ethernet packet data */
 #define __IPATH_IPATHDBG  0x0	/* Ethernet (IPATH) table dump on */

drivers/infiniband/hw/ipath/ipath_file_ops.c

@@ -1120,33 +1120,24 @@ static int mmap_rcvegrbufs(struct vm_area_struct *vma,
 }
 
 /*
- * ipath_file_vma_nopage - handle a VMA page fault.
+ * ipath_file_vma_fault - handle a VMA page fault.
  */
-static struct page *ipath_file_vma_nopage(struct vm_area_struct *vma,
-					  unsigned long address, int *type)
+static int ipath_file_vma_fault(struct vm_area_struct *vma,
+					struct vm_fault *vmf)
 {
-	unsigned long offset = address - vma->vm_start;
-	struct page *page = NOPAGE_SIGBUS;
-	void *pageptr;
+	struct page *page;
 
-	/*
-	 * Convert the vmalloc address into a struct page.
-	 */
-	pageptr = (void *)(offset + (vma->vm_pgoff << PAGE_SHIFT));
-	page = vmalloc_to_page(pageptr);
+	page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
 	if (!page)
-		goto out;
-
-	/* Increment the reference count. */
+		return VM_FAULT_SIGBUS;
 	get_page(page);
-	if (type)
-		*type = VM_FAULT_MINOR;
-out:
-	return page;
+	vmf->page = page;
+
+	return 0;
 }
 
 static struct vm_operations_struct ipath_file_vm_ops = {
-	.nopage = ipath_file_vma_nopage,
+	.fault = ipath_file_vma_fault,
 };
 
 static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,