Linux 2.6.16.43
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / lib / bust_spinlocks.c
blob6bb7319e09a006588e697bda90a063703868b04c
1 /*
2 * lib/bust_spinlocks.c
4 * Provides a minimal bust_spinlocks for architectures which don't have one of their own.
6 * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
7 * and panic() information from reaching the user.
8 */
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>
18 void bust_spinlocks(int yes)
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;
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...
33 console_loglevel = 15; /* NMI oopser may have shut the console up */
34 printk(" ");
35 console_loglevel = loglevel_save;