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Linux/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 
 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 

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