Root/lib/bust_spinlocks.c

1/*
2 * lib/bust_spinlocks.c
3 *
4 * Provides a minimal bust_spinlocks for architectures which don't have one of their own.
5 *
6 * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
7 * and panic() information from reaching the user.
8 */
9
10#include <linux/kernel.h>
11#include <linux/printk.h>
12#include <linux/spinlock.h>
13#include <linux/tty.h>
14#include <linux/wait.h>
15#include <linux/vt_kern.h>
16#include <linux/console.h>
17
18
19void __attribute__((weak)) bust_spinlocks(int yes)
20{
21    if (yes) {
22        ++oops_in_progress;
23    } else {
24#ifdef CONFIG_VT
25        unblank_screen();
26#endif
27        console_unblank();
28        if (--oops_in_progress == 0)
29            wake_up_klogd();
30    }
31}
32

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