xref: /linux/lib/bust_spinlocks.c (revision 0a64ce6e) 
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * lib/bust_spinlocks.c
4  *
5  * Provides a minimal bust_spinlocks for architectures which don't
6  * have one of their own.
7  *
8  * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
9  * and panic() information from reaching the user.
10  */
11 
12 #include <linux/kernel.h>
13 #include <linux/printk.h>
14 #include <linux/spinlock.h>
15 #include <linux/tty.h>
16 #include <linux/wait.h>
17 #include <linux/vt_kern.h>
18 #include <linux/console.h>
19 
bust_spinlocks(int yes)20 void bust_spinlocks(int yes)
21 {
22 	if (yes) {
23 		++oops_in_progress;
24 	} else {
25 		console_unblank();
26 		if (--oops_in_progress == 0)
27 			wake_up_klogd();
28 	}
29 }
30