| 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 | console_unblank(); |
| 26 | if (--oops_in_progress == 0) |
| 27 | wake_up_klogd(); |
| 28 | } |
| 29 | } |
| 30 |