Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/lib/bust_spinlocks.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 931 byte(s)
Tag kernel26-2.6.12-alx-r9
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 |