1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H 3 #define _LINUX_KERNEL_FTRACE_INTERNAL_H 4 5 #ifdef CONFIG_FUNCTION_TRACER 6 7 extern struct mutex ftrace_lock; 8 extern struct ftrace_ops global_ops; 9 10 #ifdef CONFIG_DYNAMIC_FTRACE 11 12 int ftrace_startup(struct ftrace_ops *ops, int command); 13 int ftrace_shutdown(struct ftrace_ops *ops, int command); 14 int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs); 15 16 #else /* !CONFIG_DYNAMIC_FTRACE */ 17 18 int __register_ftrace_function(struct ftrace_ops *ops); 19 int __unregister_ftrace_function(struct ftrace_ops *ops); 20 /* Keep as macros so we do not need to define the commands */ 21 # define ftrace_startup(ops, command) \ 22 ({ \ 23 int ___ret = __register_ftrace_function(ops); \ 24 if (!___ret) \ 25 (ops)->flags |= FTRACE_OPS_FL_ENABLED; \ 26 ___ret; \ 27 }) 28 # define ftrace_shutdown(ops, command) \ 29 ({ \ 30 int ___ret = __unregister_ftrace_function(ops); \ 31 if (!___ret) \ 32 (ops)->flags &= ~FTRACE_OPS_FL_ENABLED; \ 33 ___ret; \ 34 }) 35 static inline int 36 ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs) 37 { 38 return 1; 39 } 40 #endif /* CONFIG_DYNAMIC_FTRACE */ 41 42 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 43 extern int ftrace_graph_active; 44 void update_function_graph_func(void); 45 #else /* !CONFIG_FUNCTION_GRAPH_TRACER */ 46 # define ftrace_graph_active 0 47 static inline void update_function_graph_func(void) { } 48 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ 49 50 #else /* !CONFIG_FUNCTION_TRACER */ 51 #endif /* CONFIG_FUNCTION_TRACER */ 52 53 #endif 54