linux/arch/um/kernel/early_printk.c
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   1/*
   2 * Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/console.h>
  11#include <linux/init.h>
  12#include "os.h"
  13
  14static void early_console_write(struct console *con, const char *s, unsigned int n)
  15{
  16        um_early_printk(s, n);
  17}
  18
  19static struct console early_console = {
  20        .name = "earlycon",
  21        .write = early_console_write,
  22        .flags = CON_BOOT,
  23        .index = -1,
  24};
  25
  26static int __init setup_early_printk(char *buf)
  27{
  28        register_console(&early_console);
  29
  30        return 0;
  31}
  32
  33early_param("earlyprintk", setup_early_printk);
  34
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