X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=mm%2Fmmap.c;h=f717453b1a57c721a66be436e9ef270a156bba8d;hb=f872f5400cc01373d8e29d9c7a5296ccfaf4ccf3;hp=2ce04a649f6b4977e54b76a29be9d5bac5e71dab;hpb=c09c9dd2e9c732658c744a802101d5c34fedde22;p=mirror_ubuntu-artful-kernel.git

diff --git a/mm/mmap.c b/mm/mmap.c
index 2ce04a649f6b..f717453b1a57 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3030,11 +3030,16 @@ static int special_mapping_fault(struct vm_area_struct *vma,
 	pgoff_t pgoff;
 	struct page **pages;
 
-	if (vma->vm_ops == &legacy_special_mapping_vmops)
+	if (vma->vm_ops == &legacy_special_mapping_vmops) {
 		pages = vma->vm_private_data;
-	else
-		pages = ((struct vm_special_mapping *)vma->vm_private_data)->
-			pages;
+	} else {
+		struct vm_special_mapping *sm = vma->vm_private_data;
+
+		if (sm->fault)
+			return sm->fault(sm, vma, vmf);
+
+		pages = sm->pages;
+	}
 
 	for (pgoff = vmf->pgoff; pgoff && *pages; ++pages)
 		pgoff--;