add mipi 800x1280 panel drivers in kernel

ronnie

2022-10-23 e3a1b9bdd0692904702c0e734ea5dfde3b0ac8fb

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/*
 * trace context switch
 *
 * Copyright (C) 2007 Steven Rostedt <srostedt@redhat.com>
 *
 */
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
#include <trace/events/sched.h>
 
#include "trace.h"
 
static int            sched_ref;
static DEFINE_MUTEX(sched_register_mutex);
 
static void
probe_sched_switch(void *ignore, bool preempt,
           struct task_struct *prev, struct task_struct *next)
{
    if (unlikely(!sched_ref))
        return;
 
    tracing_record_cmdline(prev);
    tracing_record_cmdline(next);
}
 
static void
probe_sched_wakeup(void *ignore, struct task_struct *wakee)
{
    if (unlikely(!sched_ref))
        return;
 
    tracing_record_cmdline(current);
}
 
static int tracing_sched_register(void)
{
    int ret;
 
    ret = register_trace_sched_wakeup(probe_sched_wakeup, NULL);
    if (ret) {
        pr_info("wakeup trace: Couldn't activate tracepoint"
            " probe to kernel_sched_wakeup\n");
        return ret;
    }
 
    ret = register_trace_sched_wakeup_new(probe_sched_wakeup, NULL);
    if (ret) {
        pr_info("wakeup trace: Couldn't activate tracepoint"
            " probe to kernel_sched_wakeup_new\n");
        goto fail_deprobe;
    }
 
    ret = register_trace_sched_switch(probe_sched_switch, NULL);
    if (ret) {
        pr_info("sched trace: Couldn't activate tracepoint"
            " probe to kernel_sched_switch\n");
        goto fail_deprobe_wake_new;
    }
 
    return ret;
fail_deprobe_wake_new:
    unregister_trace_sched_wakeup_new(probe_sched_wakeup, NULL);
fail_deprobe:
    unregister_trace_sched_wakeup(probe_sched_wakeup, NULL);
    return ret;
}
 
static void tracing_sched_unregister(void)
{
    unregister_trace_sched_switch(probe_sched_switch, NULL);
    unregister_trace_sched_wakeup_new(probe_sched_wakeup, NULL);
    unregister_trace_sched_wakeup(probe_sched_wakeup, NULL);
}
 
static void tracing_start_sched_switch(void)
{
    mutex_lock(&sched_register_mutex);
    if (!(sched_ref++))
        tracing_sched_register();
    mutex_unlock(&sched_register_mutex);
}
 
static void tracing_stop_sched_switch(void)
{
    mutex_lock(&sched_register_mutex);
    if (!(--sched_ref))
        tracing_sched_unregister();
    mutex_unlock(&sched_register_mutex);
}
 
void tracing_start_cmdline_record(void)
{
    tracing_start_sched_switch();
}
 
void tracing_stop_cmdline_record(void)
{
    tracing_stop_sched_switch();
}