diff --git a/include/linux/mm.h b/include/linux/mm.h
index e41795b..45ee5b5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1231,7 +1231,7 @@
 #define FOLL_WRITE	0x01	/* check pte is writable */
 #define FOLL_TOUCH	0x02	/* mark page accessed */
 #define FOLL_GET	0x04	/* do get_page on page */
-#define FOLL_ANON	0x08	/* give ZERO_PAGE if no pgtable */
+#define FOLL_DUMP	0x08	/* give error on hole if it would be zero */
 
 typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
 			void *data);
diff --git a/mm/internal.h b/mm/internal.h
index 166765c..d414750 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -252,6 +252,7 @@
 
 #define GUP_FLAGS_WRITE		0x01
 #define GUP_FLAGS_FORCE		0x02
+#define GUP_FLAGS_DUMP		0x04
 
 int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 		     unsigned long start, int len, int flags,
diff --git a/mm/memory.c b/mm/memory.c
index a8430ff..532a55b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1174,41 +1174,22 @@
 	pte_unmap_unlock(ptep, ptl);
 	if (!pte_none(pte))
 		return page;
-	/* Fall through to ZERO_PAGE handling */
+
 no_page_table:
 	/*
 	 * When core dumping an enormous anonymous area that nobody
-	 * has touched so far, we don't want to allocate page tables.
+	 * has touched so far, we don't want to allocate unnecessary pages or
+	 * page tables.  Return error instead of NULL to skip handle_mm_fault,
+	 * then get_dump_page() will return NULL to leave a hole in the dump.
+	 * But we can only make this optimization where a hole would surely
+	 * be zero-filled if handle_mm_fault() actually did handle it.
 	 */
-	if (flags & FOLL_ANON) {
-		page = ZERO_PAGE(0);
-		if (flags & FOLL_GET)
-			get_page(page);
-		BUG_ON(flags & FOLL_WRITE);
-	}
+	if ((flags & FOLL_DUMP) &&
+	    (!vma->vm_ops || !vma->vm_ops->fault))
+		return ERR_PTR(-EFAULT);
 	return page;
 }
 
-/* Can we do the FOLL_ANON optimization? */
-static inline int use_zero_page(struct vm_area_struct *vma)
-{
-	/*
-	 * We don't want to optimize FOLL_ANON for make_pages_present()
-	 * when it tries to page in a VM_LOCKED region. As to VM_SHARED,
-	 * we want to get the page from the page tables to make sure
-	 * that we serialize and update with any other user of that
-	 * mapping.
-	 */
-	if (vma->vm_flags & (VM_LOCKED | VM_SHARED))
-		return 0;
-	/*
-	 * And if we have a fault routine, it's not an anonymous region.
-	 */
-	return !vma->vm_ops || !vma->vm_ops->fault;
-}
-
-
-
 int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 		     unsigned long start, int nr_pages, int flags,
 		     struct page **pages, struct vm_area_struct **vmas)
@@ -1288,8 +1269,8 @@
 		foll_flags = FOLL_TOUCH;
 		if (pages)
 			foll_flags |= FOLL_GET;
-		if (!write && use_zero_page(vma))
-			foll_flags |= FOLL_ANON;
+		if (flags & GUP_FLAGS_DUMP)
+			foll_flags |= FOLL_DUMP;
 
 		do {
 			struct page *page;
@@ -1446,7 +1427,7 @@
 	struct page *page;
 
 	if (__get_user_pages(current, current->mm, addr, 1,
-				GUP_FLAGS_FORCE, &page, &vma) < 1)
+			GUP_FLAGS_FORCE | GUP_FLAGS_DUMP, &page, &vma) < 1)
 		return NULL;
 	if (page == ZERO_PAGE(0)) {
 		page_cache_release(page);