* Ingo Molnar <[EMAIL PROTECTED]> wrote:

> Subject: [patch] lockdep: show held locks when showing a stackdump
> From: Ingo Molnar <[EMAIL PROTECTED]>
> 
> lockdep can be used to print held locks when printing a backtrace. 
> This can be useful when debugging things like 'scheduling while 
> atomic' asserts.

on x86_64 this also needs the patch below - NULL means 'current'.

        Ingo

Index: linux/kernel/lockdep.c
===================================================================
--- linux.orig/kernel/lockdep.c
+++ linux/kernel/lockdep.c
@@ -395,7 +395,11 @@ static void print_lock(struct held_lock 
 
 static void lockdep_print_held_locks(struct task_struct *curr)
 {
-       int i, depth = curr->lockdep_depth;
+       int i, depth;
+
+       if (!curr)
+               curr = current;
+       depth = curr->lockdep_depth;
 
        if (!depth) {
                printk("no locks held by %s/%d.\n", curr->comm, curr->pid);
-
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