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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /lib/bust_spinlocks.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'lib/bust_spinlocks.c')
-rw-r--r--lib/bust_spinlocks.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c
new file mode 100644
index 000000000000..6bb7319e09a0
--- /dev/null
+++ b/lib/bust_spinlocks.c
@@ -0,0 +1,39 @@
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
18void 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