[linux-2.6-block.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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	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
1da177e4	11	#include <linux/kernel.h>
dc72c32e	12	#include <linux/printk.h>
1da177e4 LT	13	#include <linux/spinlock.h>
	14	#include <linux/tty.h>
	15	#include <linux/wait.h>
	16	#include <linux/vt_kern.h>
b61312d3	17	#include <linux/console.h>
1da177e4 LT	18
1da177e4 LT	19
cefc8be8	20	void __attribute__((weak)) bust_spinlocks(int yes)
1da177e4 LT	21	{
1da177e4 LT	22	if (yes) {
00442995	23	++oops_in_progress;
1da177e4	24	} else {
1da177e4 LT	25	#ifdef CONFIG_VT
	26	unblank_screen();
	27	#endif
b61312d3	28	console_unblank();
00442995 JB	29	if (--oops_in_progress == 0)
00442995 JB	30	wake_up_klogd();
1da177e4 LT	31	}
1da177e4 LT	32	}