From 2a15e69ebe0c99a1997952e63c6702c05aa93db0 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Mon, 19 Nov 2007 13:14:59 -0800
Subject: [PATCH] Slightly faster implementation of the deadman counter

Count down to zero instead of up to a constant...
---
 preproc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/preproc.c b/preproc.c
index f9c4de36..1de92855 100644
--- a/preproc.c
+++ b/preproc.c
@@ -2994,7 +2994,7 @@ static Token *expand_smacro(Token * tline)
     Token *org_tline = tline;
     Context *ctx;
     char *mname;
-    int deadman = 0;
+    int deadman = DEADMAN_LIMIT;
 
     /*
      * Trick: we should avoid changing the start token pointer since it can
@@ -3016,7 +3016,7 @@ again:
     thead = NULL;
 
     while (tline) {             /* main token loop */
-	if (++deadman > DEADMAN_LIMIT) {
+	if (!--deadman) {
 	    error(ERR_NONFATAL, "interminable macro recursion");
 	    break;
 	}
-- 
2.11.4.GIT