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Commit 8f63fdbb authored by Dave Jones's avatar Dave Jones Committed by Linus Torvalds
Browse files

[PATCH] More list debugging context 



Print the other (hopefully) known good pointer when list_head debugging
too, which may yield additional clues.

Also fix for 80-columns to win akpm brownie points.

Signed-off-by: default avatarDave Jones <davej@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 5d469ec0

lib/list_debug.c

+6 −4
Original line number Original line Diff line number Diff line
@@ -21,13 +21,15 @@ void __list_add(struct list_head *new, 
			      struct list_head *next)

			      struct list_head *next)

{

{

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

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

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

		printk(KERN_ERR "list_add corruption. next->prev should be "

			prev, next->prev);

			"prev (%p), but was %p. (next=%p).\n",

			prev, next->prev, next);

		BUG();

		BUG();

	}

	}

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

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

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

		printk(KERN_ERR "list_add corruption. prev->next should be "

			next, prev->next);

			"next (%p), but was %p. (prev=%p).\n",

			next, prev->next, prev);

		BUG();

		BUG();

	}

	}

	next->prev = new;

	next->prev = new;