more changes on original files
[linux-2.4.git] / lib / bust_spinlocks.c
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 extern spinlock_t timerlist_lock;
18
19 void 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