[NOMMU]: stub expand_stack() for nommu case

[Greg Ungerer <gerg@snapgear.com>]

Be consistent with VM mmap, implement expand_stack().
We can't actually do anything other than return an error
in the no MMU case though.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
---


diff -Naur linux-2.6.22/mm/nommu.c linux-2.6.22-uc0/mm/nommu.c
--- linux-2.6.22/mm/nommu.c	2007-07-12 15:22:07.000000000 +1000
+++ linux-2.6.22-uc0/mm/nommu.c	2007-07-12 15:24:21.000000000 +1000
@@ -367,6 +367,11 @@
 	return find_vma(mm, addr);
 }
 
+int expand_stack(struct vm_area_struct *vma, unsigned long address)
+{
+	return -ENOMEM;
+}
+
 /*
  * look up the first VMA exactly that exactly matches addr
  * - should be called with mm->mmap_sem at least held readlocked
-
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