* Thomas Gleixner <t...@linutronix.de> wrote:

> -     if (unlikely(!ret))
> +     if (unlikely(!ret)) {
> +             if (!trace->nr_entries) {
> +                     /*
> +                      * If save_trace fails here, the printing might
> +                      * trigger a WARN but because of the !nr_entries it
> +                      * should not do bad things.
> +                      */
> +                     save_trace(trace);
> +             }
>               return print_circular_bug(&this, target_entry, next, prev);
> +     }
>       else if (unlikely(ret < 0))
>               return print_bfs_bug(ret);

Just a minor style nit: the 'else' should probably on the same line as 
the '}' it belongs to, to make it really obvious that the 'if' has an 
'else' branch?

At that point the condition should probably also use balanced curly 
braces.

Interdiff looks good otherwise.

Thanks,

        Ingo
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