Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 |