tweak comment

diff --git a/lib/mmap-stack.c b/lib/mmap-stack.c
index 192cf2cf39f9712275d71247bc95da2ced95181d..2b84117cfa301b659d1106502ac3615a01bcd296 100644 (file)
--- a/lib/mmap-stack.c
+++ b/lib/mmap-stack.c
@@ -55,7 +55,7 @@ get_context (ucontext_t *ctx, size_t size)
   if (getcontext (ctx))
     return 1;
 
-  /* use tmpfile if MAP_ANONYMOUS is not defined. */
+  /* use tmpfile if MAP_ANONYMOUS is not useful. */
 #if MAP_ANONYMOUS == 0
   {
     FILE *fp = tmpfile ();