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    SubjectRe: [Bug? Report] kref problem
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    On Thu, 2006-03-16 at 08:53 -0800, Greg KH wrote: 
    > > static void a_release(struct kobject *kobj)
    > > {
    > > struct my_obj_a *a;
    > >
    > > printk("%s\n", __FUNCTION__);
    > > a = container_of(kobj, struct my_obj_a, kobj);
    > > sysfs_remove_dir(&a->kobj);
    >
    > Woah, don't do that here, the kobject core already does this. A release
    > function is for you to release the memory you have created with this
    > kobject, not to mess with sysfs.
    So do you mean this (attached) ? Anyway I end up with -1 kref.

    My real task is: I have sysfs directory /sys/A which corresponds to my
    module, to my subsystem. There I want to create subdirectories
    like /sys/A/B/ and delete them from time to time. So the problem is that
    whenver I remove B I end up with A's kref decremented. The attached test
    demonstrates this. P;ease, look at its output:

    a inited, kref 1
    b inited, kref 1
    dir A created, A kref 1, B kref 1
    dir B created, A kref 1, B kref 1
    dir B removed, A kref 1, B kref 1
    b_release
    a_release <--- What is this? I removed B, not A ???
    kobj B put, A kref 0, B kref 0
    dir A removed, A kref 0, B kref 0
    kobj A put, A kref -1, B kref 0

    Thanks.

    --
    Best Regards,
    Artem B. Bityuckiy,
    St.-Petersburg, Russia.

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