[pso] list_head si kfree()

[Andrei Costin]

Salut.

.... eu cred ca nu mai stiu sa deloc list_head-ul asta...

In module_init am ceva de genul (OBS: source code pentru test, nu are legatura DIRECTA!!!
cu source code pentru tema)

(mai am declarata globala "static LIST_HEAD(the_list);")
-----------------------------------------------------
        ...
        struct my_use *mu;
        struct list_head *tmp;
        ...
        mu = kmalloc(sizeof(*mu), GFP_KERNEL);
        if (!mu)
        {
                printk ( "kmalloc() no mem\n" );
                return -ENOMEM;
        }
        kfree(mu);    <------- KFREE-ul asta nu da segmentation fault

        // Populez lista
        for (i=0; i<100; i++)
        {
                if ( !(mu = kmalloc(sizeof(*mu), GFP_KERNEL)) )
                {
                        printk( "-ENOMEM\n" );
                        // Trebuie sa eliberez ce am alocat anterior, dar aici nu asta
conteaza, oricum kmalloc-u aici merge ok
                        return -ENOMEM;
                }

                memset(mu, 0, sizeof(*mu));
                mu->mu_i = i;

                list_add(&(mu->mu_list), &the_list);
        }

        list_for_each(tmp, &the_list)
        {
                mu = list_entry(tmp, struct monitor_unit, mu_list);
                printk( "i=(%d)\n", mu->mu_i );
                list_del( &(mu->mu_list) );     <------- Da mereu segmentation fault
                kfree(mu);                      <------- Da mereu segmentation fault
        }

-------------------------------------------------------------------------------------------

Modulul dupa asta da un OPPS...

Best regards & respect,
 Andrei Costin (mailto:zveriu_biz@yahoo.com)

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