lib/bust_spinlocks.c

Source file repositories/reference/linux-study-clean/lib/bust_spinlocks.c

File Facts

System
Linux kernel
Corpus path
lib/bust_spinlocks.c
Extension
.c
Size
632 bytes
Lines
30
Domain
Kernel Services
Bucket
lib
Inferred role
Kernel Services: implementation source
Status
source implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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 bust_spinlocks(int yes)
{
	if (yes) {
		++oops_in_progress;
	} else {
		console_unblank();
		if (--oops_in_progress == 0)
			wake_up_klogd();
	}
}

Annotation

Implementation Notes