bust_spinlocks.c 676 B

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * lib/bust_spinlocks.c
  4. *
  5. * Provides a minimal bust_spinlocks for architectures which don't
  6. * have one of their own.
  7. *
  8. * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
  9. * and panic() information from reaching the user.
  10. */
  11. #include <linux/kernel.h>
  12. #include <linux/printk.h>
  13. #include <linux/spinlock.h>
  14. #include <linux/tty.h>
  15. #include <linux/wait.h>
  16. #include <linux/vt_kern.h>
  17. #include <linux/console.h>
  18. void bust_spinlocks(int yes)
  19. {
  20. if (yes) {
  21. ++oops_in_progress;
  22. } else {
  23. #ifdef CONFIG_VT
  24. unblank_screen();
  25. #endif
  26. console_unblank();
  27. if (--oops_in_progress == 0)
  28. wake_up_klogd();
  29. }
  30. }