[PATCH] hwmon: hwmon vs i2c, second round (05/11)
[linux-2.6] / 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
18 void 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