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    SubjectRe: Linux 3.4 released
    Hello, Jörg-Volker.

    Please always use reply-to-all.

    On Tue, May 22, 2012 at 09:50:10PM +0200, Jörg-Volker Peetz wrote:
    > no, changing to printk(KERN_CRIT "XXX: ...", ...) in kernel/workqueue.c didn't
    > print anything I could read. Would it appear before the "panic screen"? But I'm
    > not able to scroll back.
    > The Panic screen starts with

    It should appear right above BUG:. Can you please try the following
    instead?

    Thanks.

    diff --git a/kernel/workqueue.c b/kernel/workqueue.c
    index 5abf42f..57c33ef 100644
    --- a/kernel/workqueue.c
    +++ b/kernel/workqueue.c
    @@ -1096,10 +1096,18 @@ queue_work_on(int cpu, struct workqueue_struct *wq, struct work_struct *work)
    }
    EXPORT_SYMBOL_GPL(queue_work_on);

    +#include <linux/uaccess.h>
    static void delayed_work_timer_fn(unsigned long __data)
    {
    struct delayed_work *dwork = (struct delayed_work *)__data;
    struct cpu_workqueue_struct *cwq = get_work_cwq(&dwork->work);
    + unsigned long v;
    +
    + if (probe_kernel_read(&v, &cwq->wq, sizeof(v))) {
    + printk(KERN_CRIT "XXX delayed_work_timer_fn: cwq %p, fn=%pf\n",
    + cwq, dwork->work.func);
    + return;
    + }

    __queue_work(smp_processor_id(), cwq->wq, &dwork->work);
    }
    --
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