[mirror_ubuntu-bionic-kernel.git] / lib / bust_spinlocks.c

// SPDX-License-Identifier: GPL-2.0
/*
 * lib/bust_spinlocks.c
 *
 * Provides a minimal bust_spinlocks for architectures which don't have one of their own.
 *
 * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
 * and panic() information from reaching the user.
 */

#include <linux/kernel.h>
#include <linux/printk.h>
#include <linux/spinlock.h>
#include <linux/tty.h>
#include <linux/wait.h>
#include <linux/vt_kern.h>
#include <linux/console.h>


void __attribute__((weak)) bust_spinlocks(int yes)
{
	if (yes) {
		++oops_in_progress;
	} else {
#ifdef CONFIG_VT
		unblank_screen();
#endif
		console_unblank();
		if (--oops_in_progress == 0)
			wake_up_klogd();
	}
}
Commit	Line	Data
	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
	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	}