1// SPDX-License-Identifier: GPL-2.0
2/*
3 * lib/bust_spinlocks.c
4 *
5 * Provides a minimal bust_spinlocks for architectures which don't
6 * have one of their own.
7 *
8 * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
9 * and panic() information from reaching the user.
10 */
11
12#include <linux/kernel.h>
13#include <linux/printk.h>
14#include <linux/spinlock.h>
15#include <linux/tty.h>
16#include <linux/wait.h>
17#include <linux/vt_kern.h>
18#include <linux/console.h>
19
20void bust_spinlocks(int yes)
21{
22 if (yes) {
23 ++oops_in_progress;
24 } else {
25#ifdef CONFIG_VT
26 unblank_screen();
27#endif
28 console_unblank();
29 if (--oops_in_progress == 0)
30 wake_up_klogd();
31 }
32}
33