diff options
Diffstat (limited to 'lib/bust_spinlocks.c')
-rw-r--r-- | lib/bust_spinlocks.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c new file mode 100644 index 0000000..486da62 --- /dev/null +++ b/lib/bust_spinlocks.c @@ -0,0 +1,30 @@ +/* + * lib/bust_spinlocks.c + * + * Provides a minimal bust_spinlocks for architectures which don't have one of their own. + * + * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG() + * and panic() information from reaching the user. + */ + +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/tty.h> +#include <linux/wait.h> +#include <linux/vt_kern.h> + + +void __attribute__((weak)) bust_spinlocks(int yes) +{ + if (yes) { + ++oops_in_progress; + } else { +#ifdef CONFIG_VT + unblank_screen(); +#endif + if (--oops_in_progress == 0) + wake_up_klogd(); + } +} + + |