LXR linux/arch/um/kernel/kmsg

   1// SPDX-License-Identifier: GPL-2.0
   2#include <linux/kmsg_dump.h>
   3#include <linux/console.h>
   4#include <shared/init.h>
   5#include <shared/kern.h>
   6#include <os.h>
   7
   8static void kmsg_dumper_stdout(struct kmsg_dumper *dumper,
   9                                enum kmsg_dump_reason reason)
  10{
  11        static char line[1024];
  12
  13        size_t len = 0;
  14        bool con_available = false;
  15
  16        /* only dump kmsg when no console is available */
  17        if (!console_trylock())
  18                return;
  19
  20        if (console_drivers != NULL)
  21                con_available = true;
  22
  23        console_unlock();
  24
  25        if (con_available == true)
  26                return;
  27
  28        printf("kmsg_dump:\n");
  29        while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) {
  30                line[len] = '\0';
  31                printf("%s", line);
  32        }
  33}
  34
  35static struct kmsg_dumper kmsg_dumper = {
  36        .dump = kmsg_dumper_stdout
  37};
  38
  39int __init kmsg_dumper_stdout_init(void)
  40{
  41        return kmsg_dump_register(&kmsg_dumper);
  42}
  43
  44__uml_postsetup(kmsg_dumper_stdout_init);
  45