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linux-stable/kernel/trace/ftrace_internal.h

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ftrace: Create new ftrace_internal.h header In order to move function graph infrastructure into its own file (fgraph.h) it needs to access various functions and variables in ftrace.c that are currently static. Create a new file called ftrace-internal.h that holds the function prototypes and the extern declarations of the variables needed by fgraph.c as well, and make them global in ftrace.c such that they can be used outside that file. Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-11-15 17:32:38 +00:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H
#define _LINUX_KERNEL_FTRACE_INTERNAL_H
tracing: arm64: Avoid missing-prototype warnings These are all tracing W=1 warnings in arm64 allmodconfig about missing prototypes: kernel/trace/trace_kprobe_selftest.c:7:5: error: no previous prototype for 'kprobe_trace_selftest_target' [-Werror=missing-pro totypes] kernel/trace/ftrace.c:329:5: error: no previous prototype for '__register_ftrace_function' [-Werror=missing-prototypes] kernel/trace/ftrace.c:372:5: error: no previous prototype for '__unregister_ftrace_function' [-Werror=missing-prototypes] kernel/trace/ftrace.c:4130:15: error: no previous prototype for 'arch_ftrace_match_adjust' [-Werror=missing-prototypes] kernel/trace/fgraph.c:243:15: error: no previous prototype for 'ftrace_return_to_handler' [-Werror=missing-prototypes] kernel/trace/fgraph.c:358:6: error: no previous prototype for 'ftrace_graph_sleep_time_control' [-Werror=missing-prototypes] arch/arm64/kernel/ftrace.c:460:6: error: no previous prototype for 'prepare_ftrace_return' [-Werror=missing-prototypes] arch/arm64/kernel/ptrace.c:2172:5: error: no previous prototype for 'syscall_trace_enter' [-Werror=missing-prototypes] arch/arm64/kernel/ptrace.c:2195:6: error: no previous prototype for 'syscall_trace_exit' [-Werror=missing-prototypes] Move the declarations to an appropriate header where they can be seen by the caller and callee, and make sure the headers are included where needed. Link: https://lore.kernel.org/linux-trace-kernel/20230517125215.930689-1-arnd@kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Florent Revest <revest@chromium.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> [ Fixed ftrace_return_to_handler() to handle CONFIG_HAVE_FUNCTION_GRAPH_RETVAL case ] Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2023-05-17 12:51:48 +00:00
int __register_ftrace_function(struct ftrace_ops *ops);
int __unregister_ftrace_function(struct ftrace_ops *ops);
ftrace: Create new ftrace_internal.h header In order to move function graph infrastructure into its own file (fgraph.h) it needs to access various functions and variables in ftrace.c that are currently static. Create a new file called ftrace-internal.h that holds the function prototypes and the extern declarations of the variables needed by fgraph.c as well, and make them global in ftrace.c such that they can be used outside that file. Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-11-15 17:32:38 +00:00
#ifdef CONFIG_FUNCTION_TRACER
extern struct mutex ftrace_lock;
extern struct ftrace_ops global_ops;
#ifdef CONFIG_DYNAMIC_FTRACE
int ftrace_startup(struct ftrace_ops *ops, int command);
int ftrace_shutdown(struct ftrace_ops *ops, int command);
int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs);
#else /* !CONFIG_DYNAMIC_FTRACE */
/* Keep as macros so we do not need to define the commands */
# define ftrace_startup(ops, command) \
({ \
int ___ret = __register_ftrace_function(ops); \
if (!___ret) \
(ops)->flags |= FTRACE_OPS_FL_ENABLED; \
___ret; \
})
# define ftrace_shutdown(ops, command) \
({ \
int ___ret = __unregister_ftrace_function(ops); \
if (!___ret) \
(ops)->flags &= ~FTRACE_OPS_FL_ENABLED; \
___ret; \
})
static inline int
ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs)
{
return 1;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
extern int ftrace_graph_active;
void update_function_graph_func(void);
#else /* !CONFIG_FUNCTION_GRAPH_TRACER */
# define ftrace_graph_active 0
static inline void update_function_graph_func(void) { }
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#else /* !CONFIG_FUNCTION_TRACER */
#endif /* CONFIG_FUNCTION_TRACER */
#endif