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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /lib/bust_spinlocks.c |
Initial import
Diffstat (limited to 'lib/bust_spinlocks.c')
-rw-r--r-- | lib/bust_spinlocks.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c new file mode 100644 index 000000000..f8e0e5367 --- /dev/null +++ b/lib/bust_spinlocks.c @@ -0,0 +1,31 @@ +/* + * 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/printk.h> +#include <linux/spinlock.h> +#include <linux/tty.h> +#include <linux/wait.h> +#include <linux/vt_kern.h> +#include <linux/console.h> + + +void __attribute__((weak)) bust_spinlocks(int yes) +{ + if (yes) { + ++oops_in_progress; + } else { +#ifdef CONFIG_VT + unblank_screen(); +#endif + console_unblank(); + if (--oops_in_progress == 0) + wake_up_klogd(); + } +} |