patch-2.1.3 linux/mm/memory.c

• Lines: 58
• Date: Thu Oct 10 17:09:51 1996
• Orig file: v2.1.2/linux/mm/memory.c
• Orig date: Wed Oct 9 08:55:24 1996

diff -u --recursive --new-file v2.1.2/linux/mm/memory.c linux/mm/memory.c
@@ -676,57 +676,6 @@
 }
 
 /*
- * Ugly, ugly, but the goto's result in better assembly..
- */
-int __verify_write(const void * addr, unsigned long size)
-{
-	struct vm_area_struct * vma;
-	unsigned long start = (unsigned long) addr;
-
-	if (!size)
-		return 0;
-
-	vma = find_vma(current->mm, start);
-	if (!vma)
-		goto bad_area;
-	if (vma->vm_start > start)
-		goto check_stack;
-
-good_area:
-	if (!(vma->vm_flags & VM_WRITE))
-		goto bad_area;
-	size--;
-	size += start & ~PAGE_MASK;
-	size >>= PAGE_SHIFT;
-	start &= PAGE_MASK;
-
-	for (;;) {
-		do_wp_page(current, vma, start, 1);
-		if (!size)
-			break;
-		size--;
-		start += PAGE_SIZE;
-		if (start < vma->vm_end)
-			continue;
-		vma = vma->vm_next;
-		if (!vma || vma->vm_start != start)
-			goto bad_area;
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;;
-	}
-	return 0;
-
-check_stack:
-	if (!(vma->vm_flags & VM_GROWSDOWN))
-		goto bad_area;
-	if (expand_stack(vma, start) == 0)
-		goto good_area;
-
-bad_area:
-	return -EFAULT;
-}
-
-/*
  * This function zeroes out partial mmap'ed pages at truncation time..
  */
 static void partial_clear(struct vm_area_struct *vma, unsigned long address)