tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/kernel.h>
11#include <linux/spinlock.h>
12#include <linux/tty.h>
13#include <linux/wait.h>
14#include <linux/vt_kern.h>
15
16
17void bust_spinlocks(int yes)
18{
19 if (yes) {
20 oops_in_progress = 1;
21 } else {
22 int loglevel_save = console_loglevel;
23#ifdef CONFIG_VT
24 unblank_screen();
25#endif
26 oops_in_progress = 0;
27 /*
28 * OK, the message is on the console. Now we call printk()
29 * without oops_in_progress set so that printk() will give klogd
30 * and the blanked console a poke. Hold onto your hats...
31 */
32 console_loglevel = 15; /* NMI oopser may have shut the console up */
33 printk(" ");
34 console_loglevel = loglevel_save;
35 }
36}
37
38