[PATCH] mm: fix oom roll-back of __vmalloc_area_node

__vunmap must not rely on area->nr_pages when picking the release methode
for area->pages.  It may be too small when __vmalloc_area_node failed early
due to lacking memory.  Instead, use a flag in vmstruct to differentiate.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index f6024ab4eff0..71b6363caaaf 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -11,6 +11,7 @@ struct vm_area_struct;
 #define VM_ALLOC        0x00000002      /* vmalloc() */
 #define VM_MAP          0x00000004      /* vmap()ed pages */
 #define VM_USERMAP      0x00000008      /* suitable for remap_vmalloc_range */
+#define VM_VPAGES       0x00000010      /* buffer for pages was vmalloc'ed */
 /* bits [20..32] reserved for arch specific ioremap internals */
 
 /*