Line data    Source code

       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           0 : void __attribute__((weak)) bust_spinlocks(int yes)
      20             : {
      21           0 :         if (yes) {
      22           0 :                 ++oops_in_progress;
      23             :         } else {
      24             : #ifdef CONFIG_VT
      25           0 :                 unblank_screen();
      26             : #endif
      27           0 :                 console_unblank();
      28           0 :                 if (--oops_in_progress == 0)
      29           0 :                         wake_up_klogd();
      30             :         }
      31           0 : }