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