From: Dave Jones 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: Dave Jones Signed-off-by: Andrew Morton --- lib/list_debug.c | 10 ++++++---- 1 files changed, 6 insertions(+), 4 deletions(-) diff -puN lib/list_debug.c~more-list-debugging-context lib/list_debug.c --- a/lib/list_debug.c~more-list-debugging-context +++ a/lib/list_debug.c @@ -21,13 +21,15 @@ void __list_add(struct list_head *new, struct list_head *next) { if (unlikely(next->prev != prev)) { - printk(KERN_ERR "list_add corruption. next->prev should be %p, but was %p\n", - prev, next->prev); + printk(KERN_ERR "list_add corruption. next->prev should be " + "prev (%p), but was %p. (next=%p).\n", + prev, next->prev, next); BUG(); } if (unlikely(prev->next != next)) { - printk(KERN_ERR "list_add corruption. prev->next should be %p, but was %p\n", - next, prev->next); + printk(KERN_ERR "list_add corruption. prev->next should be " + "next (%p), but was %p. (prev=%p).\n", + next, prev->next, prev); BUG(); } next->prev = new; _