blob: f8e0e536739832bdd05df68647e373788c060fda
| 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 | |
| 19 | void __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 |