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 have one of their own.
6  *
7  * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
8  * and panic() information from reaching the user.
9  */
10 
11 #include <linux/kernel.h>
12 #include <linux/printk.h>
13 #include <linux/spinlock.h>
14 #include <linux/tty.h>
15 #include <linux/wait.h>
16 #include <linux/vt_kern.h>
17 #include <linux/console.h>
18 
19 
bust_spinlocks(int yes)20 void __attribute__((weak)) bust_spinlocks(int yes)
21 {
22 	if (yes) {
23 		++oops_in_progress;
24 	} else {
25 #ifdef CONFIG_VT
26 		unblank_screen();
27 #endif
28 		console_unblank();
29 		if (--oops_in_progress == 0)
30 			wake_up_klogd();
31 	}
32 }
33