diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/ftrace.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index d017c2c82c4..bebbc959ee8 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1638,12 +1638,12 @@ static void ftrace_startup_enable(int command) ftrace_run_update_code(command); } -static void ftrace_startup(struct ftrace_ops *ops, int command) +static int ftrace_startup(struct ftrace_ops *ops, int command) { bool hash_enable = true; if (unlikely(ftrace_disabled)) - return; + return -ENODEV; ftrace_start_up++; command |= FTRACE_ENABLE_CALLS; @@ -1662,6 +1662,8 @@ static void ftrace_startup(struct ftrace_ops *ops, int command) ftrace_hash_rec_enable(ops, 1); ftrace_startup_enable(command); + + return 0; } static void ftrace_shutdown(struct ftrace_ops *ops, int command) @@ -2501,7 +2503,7 @@ static void __enable_ftrace_function_probe(void) ret = __register_ftrace_function(&trace_probe_ops); if (!ret) - ftrace_startup(&trace_probe_ops, 0); + ret = ftrace_startup(&trace_probe_ops, 0); ftrace_probe_registered = 1; } @@ -3466,7 +3468,7 @@ device_initcall(ftrace_nodyn_init); static inline int ftrace_init_dyn_debugfs(struct dentry *d_tracer) { return 0; } static inline void ftrace_startup_enable(int command) { } /* Keep as macros so we do not need to define the commands */ -# define ftrace_startup(ops, command) do { } while (0) +# define ftrace_startup(ops, command) ({0;}) # define ftrace_shutdown(ops, command) do { } while (0) # define ftrace_startup_sysctl() do { } while (0) # define ftrace_shutdown_sysctl() do { } while (0) @@ -3799,7 +3801,7 @@ int register_ftrace_function(struct ftrace_ops *ops) ret = __register_ftrace_function(ops); if (!ret) - ftrace_startup(ops, 0); + ret = ftrace_startup(ops, 0); out_unlock: @@ -4045,7 +4047,7 @@ int register_ftrace_graph(trace_func_graph_ret_t retfunc, ftrace_graph_return = retfunc; ftrace_graph_entry = entryfunc; - ftrace_startup(&global_ops, FTRACE_START_FUNC_RET); + ret = ftrace_startup(&global_ops, FTRACE_START_FUNC_RET); out: mutex_unlock(&ftrace_lock); |