diff options
Diffstat (limited to 'lib/bust_spinlocks.c')
| -rw-r--r-- | lib/bust_spinlocks.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c new file mode 100644 index 000000000000..6bb7319e09a0 --- /dev/null +++ b/lib/bust_spinlocks.c @@ -0,0 +1,39 @@ +/* + * 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/config.h> +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/tty.h> +#include <linux/wait.h> +#include <linux/vt_kern.h> + + +void bust_spinlocks(int yes) +{ + if (yes) { + oops_in_progress = 1; + } else { + int loglevel_save = console_loglevel; +#ifdef CONFIG_VT + unblank_screen(); +#endif + oops_in_progress = 0; + /* + * OK, the message is on the console. Now we call printk() + * without oops_in_progress set so that printk() will give klogd + * and the blanked console a poke. Hold onto your hats... + */ + console_loglevel = 15; /* NMI oopser may have shut the console up */ + printk(" "); + console_loglevel = loglevel_save; + } +} + + |