[LITMUS^RT] CreateAPluginTutorial - Step4 : error when compiling

[Schorr Stefan]

On 05/07/2013 02:19 PM, Björn Brandenburg wrote:
> If it doesn't go away, you are probably missing a header file. Here are the one from the reference version. Does it fail with these headers as well?

Hi Björn,
thanks for the fast reply!
There's no change after make clean.
I paste my C code here:



#include <linux/percpu.h>
 
#include <litmus/litmus.h>
#include <litmus/rt_domain.h>
#include <litmus/edf_common.h>

#include <litmus/sched_plugin.h>
#include <litmus/preempt.h>
#include <litmus/debug_trace.h>



struct demo_cpu_state {
    rt_domain_t     local_queues;
       int             cpu;

    struct task_struct* scheduled;
};

static DEFINE_PER_CPU(struct demo_cpu_state, demo_cpu_state);

#define cpu_state_for(cpu_id)   (&per_cpu(demo_cpu_state, cpu_id))
#define local_cpu_state()       (&__get_cpu_var(demo_cpu_state))


static long demo_activate_plugin(void)
{
    int cpu;
    struct demo_cpu_state *state;

    for_each_online_cpu(cpu) {
        TRACE("Initializing CPU%d...\n", cpu);

        state = cpu_state_for(cpu);

        state->cpu = cpu;
        state->scheduled = NULL;
        edf_domain_init(&state->local_queues, NULL, NULL);
    }

    return 0;
}

static struct task_struct* demo_schedule(struct task_struct * prev)
{
    /* This mandatory. It triggers a transition in the LITMUS^RT remote
    * preemption state machine. Call this AFTER the plugin has made a local
        * scheduling decision.
        */
        sched_state_task_picked();

        /* We don't schedule anything for now. NULL means "schedule background work". */
        return NULL;
}

static long demo_admit_task(struct task_struct *tsk)
{
    TRACE_TASK(tsk, "rejected by demo plugin.\n");

    /* Reject every task. */
    return -EINVAL;
}

static struct sched_plugin demo_plugin = {
    .plugin_name            = "DEMO",
    .schedule               = demo_schedule,
    .admit_task             = demo_admit_task,
    .activate_plugin        = demo_activate_plugin,
};

static int __init init_demo(void)
{
    return register_sched_plugin(&demo_plugin);
}

module_init(init_demo);

-- 
*****************************************
 Dipl.-Ing. Stefan Schorr
 
 University of Kaiserslautern
 Department of Electrical Engineering
 Chair of Real-Time Systems

 Postfach 3049
 67653 Kaiserslautern,
 Germany
*****************************************