From: Andre Noll <maan@tuebingen.mpg.de>
Date: Sat, 15 May 2021 15:22:02 +0000 (+0200)
Subject: list.h: Open-code LIST_POISON1 and LIST_POISON2.
X-Git-Tag: v0.7.0~18^2~5
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=44bd59946bbe50b4e625f240b04df44e60a7c3ab

list.h: Open-code LIST_POISON1 and LIST_POISON2.

There is only one user of each.
---

diff --git a/list.h b/list.h
index f4064470..4827e8e7 100644
--- a/list.h
+++ b/list.h
@@ -61,17 +61,6 @@ static inline void list_add_tail(struct list_head *new, struct list_head *head)
 	head->prev = new;
 }
 
-/*
- * These non-NULL pointers result in page faults when dereferenced. This helps
- * to catch bugs resulting from using deleted list heads.
- */
-
-/** Used for poisoning the next pointer. */
-#define LIST_POISON1 ((void *)0x00100100)
-
-/** Used for poisoning the prev pointer. */
-#define LIST_POISON2 ((void *)0x00200200)
-
 /**
  * Delete an entry from a list.
  *
@@ -84,8 +73,12 @@ static inline void list_del(struct list_head *entry)
 {
 	entry->prev->next = entry->next;
 	entry->next->prev = entry->prev;
-	entry->next = LIST_POISON1;
-	entry->prev = LIST_POISON2;
+	/*
+	 * These non-NULL pointers result in page faults when dereferenced.
+	 * This helps to catch bugs resulting from using deleted list heads.
+	 */
+	entry->next = (void *)0x00100100;
+	entry->prev = (void *)0x00200200;
 }
 
 /**