Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit df89a864 authored by Manfred Spraul's avatar Manfred Spraul Committed by Linus Torvalds
Browse files

[PATCH] list_del debug check 



A list_del() debugging check.  Has been in -mm for years.  Dave moved
list_del() out-of-line in the debug case, so this is now suitable for
mainline.

Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 199a9afc

lib/list_debug.c

+7 −5
Original line number Diff line number Diff line
@@ -59,14 +59,17 @@ EXPORT_SYMBOL(list_add); 
 */

void list_del(struct list_head *entry)

{

	BUG_ON(entry->prev->next != entry);

	BUG_ON(entry->next->prev != entry);



	if (unlikely(entry->prev->next != entry)) {

		printk(KERN_ERR "list_del corruption. prev->next should be %p, but was %p\n",

			entry, entry->prev->next);

		printk(KERN_ERR "list_del corruption. prev->next should be %p, "

				"but was %p\n", entry, entry->prev->next);

		BUG();

	}

	if (unlikely(entry->next->prev != entry)) {

		printk(KERN_ERR "list_del corruption. next->prev should be %p, but was %p\n",

			entry, entry->next->prev);

		printk(KERN_ERR "list_del corruption. next->prev should be %p, "

				"but was %p\n", entry, entry->next->prev);

		BUG();

	}

	__list_del(entry->prev, entry->next);
@@ -74,4 +77,3 @@ void list_del(struct list_head *entry) 
	entry->prev = LIST_POISON2;

}

EXPORT_SYMBOL(list_del);