mm/vmalloc.c: add vfree comment

Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b12fd8612604..d365724feb05 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1522,6 +1522,8 @@ static void __vunmap(const void *addr, int deallocate_pages)
  *      Must not be called in NMI context (strictly speaking, only if we don't
  *      have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling
  *      conventions for vfree() arch-depenedent would be a really bad idea)
+ *
+ *      NOTE: assumes that the object at *addr has a size >= sizeof(llist_node)
  *      
  */
 void vfree(const void *addr)