Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[platform/kernel/linux-rpi.git] / lib / bust_spinlocks.c
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
20 void 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 }