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 20void __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