diff options
| -rw-r--r-- | include/linux/ftrace.h | 1 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 3121b95443d..f368d041e02 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -89,6 +89,7 @@ void ftrace_enable_daemon(void); /* totally disable ftrace - can not re-enable after this */ void ftrace_kill(void); +void ftrace_kill_atomic(void); static inline void tracer_disable(void) { diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 0f271c45cd0..1359632668a 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1602,6 +1602,21 @@ core_initcall(ftrace_dynamic_init); #endif /* CONFIG_DYNAMIC_FTRACE */ /** + * ftrace_kill_atomic - kill ftrace from critical sections + * + * This function should be used by panic code. It stops ftrace + * but in a not so nice way. If you need to simply kill ftrace + * from a non-atomic section, use ftrace_kill. + */ +void ftrace_kill_atomic(void) +{ + ftrace_disabled = 1; + ftrace_enabled = 0; + ftraced_suspend = -1; + clear_ftrace_function(); +} + +/** * ftrace_kill - totally shutdown ftrace * * This is a safety measure. If something was detected that seems |