[PATCH] Oracle startup split_vma fix

[Hugh Dickins]

Alessandro Suardi and Zlatko Calusic independently reported that
Oracle cannot start on recent 2.5: excellent research by Zlatko
quickly pointed to vm_pgoff buglet in the new split_vma.

Patch below against 2.5.40 or 2.5.40-mm1: please apply.

--- 2.5.40/mm/mmap.c	Tue Oct  1 15:33:04 2002
+++ linux/mm/mmap.c	Tue Oct  1 15:53:06 2002
@@ -1058,7 +1058,7 @@
 	if (new_below) {
 		new->vm_end = addr;
 		vma->vm_start = addr;
-		vma->vm_pgoff += ((addr - vma->vm_start) >> PAGE_SHIFT);
+		vma->vm_pgoff += ((addr - new->vm_start) >> PAGE_SHIFT);
 	} else {
 		vma->vm_end = addr;
 		new->vm_start = addr;