linux-imx

/*

 * kernel/sched/debug.c

 *

 * Print the CFS rbtree and other debugging details

 *

 * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#include "sched.h"

​

static DEFINE_SPINLOCK(sched_debug_lock);

​

/*

 * This allows printing both to /proc/sched_debug and

 * to the console

 */

#define SEQ_printf(m, x...)         \

 do {                       \

    if (m)                  \

        seq_printf(m, x);       \

    else                    \

        pr_cont(x);         \

 } while (0)

​

/*

 * Ease the printing of nsec fields:

 */

static long long nsec_high(unsigned long long nsec)

{

    if ((long long)nsec < 0) {

        nsec = -nsec;

        do_div(nsec, 1000000);

        return -nsec;

    }

    do_div(nsec, 1000000);

​

    return nsec;

}

​

static unsigned long nsec_low(unsigned long long nsec)

{

    if ((long long)nsec < 0)

        nsec = -nsec;

​

    return do_div(nsec, 1000000);

}

​

#define SPLIT_NS(x) nsec_high(x), nsec_low(x)

​

#define SCHED_FEAT(name, enabled)   \

    #name ,

​

static const char * const sched_feat_names[] = {

#include "features.h"

};

​

#undef SCHED_FEAT

​

static int sched_feat_show(struct seq_file *m, void *v)

{

    int i;

​

    for (i = 0; i < __SCHED_FEAT_NR; i++) {

        if (!(sysctl_sched_features & (1UL << i)))

            seq_puts(m, "NO_");

        seq_printf(m, "%s ", sched_feat_names[i]);

    }

    seq_puts(m, "\n");

​

    return 0;

}

​

#ifdef CONFIG_JUMP_LABEL

​

#define jump_label_key__true  STATIC_KEY_INIT_TRUE

#define jump_label_key__false STATIC_KEY_INIT_FALSE

​

#define SCHED_FEAT(name, enabled)   \

    jump_label_key__##enabled ,

​

struct static_key sched_feat_keys[__SCHED_FEAT_NR] = {

#include "features.h"

};

​

#undef SCHED_FEAT

​

static void sched_feat_disable(int i)

{

    static_key_disable_cpuslocked(&sched_feat_keys[i]);