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| author | Ingo Molnar <mingo@elte.hu> | 2008-08-20 12:39:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-20 12:39:18 +0200 |
| commit | 170465ee7f5a9a2d0ac71285507e52642e040353 (patch) | |
| tree | dbca81f04cde9e625170abbd6a72555cfbeb194e /include/linux/ftrace.h | |
| parent | 169ad16bb87c10a3f7c108bb7008ebc0270f617a (diff) | |
| parent | 1fca25427482387689fa27594c992a961d98768f (diff) | |
Merge branch 'linus' into x86/xen
Diffstat (limited to 'include/linux/ftrace.h')
| -rw-r--r-- | include/linux/ftrace.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index f368d041e02..bb384068272 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -98,6 +98,27 @@ static inline void tracer_disable(void) #endif } +/* Ftrace disable/restore without lock. Some synchronization mechanism + * must be used to prevent ftrace_enabled to be changed between + * disable/restore. */ +static inline int __ftrace_enabled_save(void) +{ +#ifdef CONFIG_FTRACE + int saved_ftrace_enabled = ftrace_enabled; + ftrace_enabled = 0; + return saved_ftrace_enabled; +#else + return 0; +#endif +} + +static inline void __ftrace_enabled_restore(int enabled) +{ +#ifdef CONFIG_FTRACE + ftrace_enabled = enabled; +#endif +} + #ifdef CONFIG_FRAME_POINTER /* TODO: need to fix this for ARM */ # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) |