1/*
2 * lib/bust_spinlocks.c
3 *
4 * Provides a minimal bust_spinlocks for architectures which don't have one of their own.
5 *
6 * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
7 * and panic() information from reaching the user.
8 */
9
10#include <linux/config.h>
11#include <linux/kernel.h>
12#include <linux/spinlock.h>
13#include <linux/tty.h>
14#include <linux/wait.h>
15#include <linux/vt_kern.h>
16
17extern spinlock_t timerlist_lock;
18
19void bust_spinlocks(int yes)
20{
21	spin_lock_init(&timerlist_lock);
22	if (yes) {
23		oops_in_progress = 1;
24	} else {
25		int loglevel_save = console_loglevel;
26#ifdef CONFIG_VT
27		unblank_screen();
28#endif
29		oops_in_progress = 0;
30		/*
31		 * OK, the message is on the console.  Now we call printk()
32		 * without oops_in_progress set so that printk() will give klogd
33		 * and the blanked console a poke.  Hold onto your hats...
34		 */
35		console_loglevel = 15;		/* NMI oopser may have shut the console up */
36		printk(" ");
37		console_loglevel = loglevel_save;
38	}
39}
40
41
42