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/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
17
18void bust_spinlocks(int yes)
19{
20 if (yes) {
21 oops_in_progress = 1;
22 } else {
23 int loglevel_save = console_loglevel;
24#ifdef CONFIG_VT
25 unblank_screen();
26#endif
27 oops_in_progress = 0;
28 /*
29 * OK, the message is on the console. Now we call printk()
30 * without oops_in_progress set so that printk() will give klogd
31 * and the blanked console a poke. Hold onto your hats...
32 */
33 console_loglevel = 15; /* NMI oopser may have shut the console up */
34 printk(" ");
35 console_loglevel = loglevel_save;
36 }
37}
38
39