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tracing/fastboot: move boot tracer structs and funcs into their own header. 

Impact: Cleanups on the boot tracer and ftrace

This patch bring some cleanups about the boot tracer headers. The
functions and structures of this tracer have nothing related to ftrace
and should have so their own header file.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2008-11-11 23:21:31 +01:00 committed by Ingo Molnar
parent 60a011c736
commit 3f5ec13696
4 changed files with 45 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
include/linux/ftrace.h
View File

@ -287,45 +287,4 @@ extern trace_function_return_t ftrace_function_return;
extern void unregister_ftrace_return(void);
#endif
/*
* Structure which defines the trace of an initcall.
* You don't have to fill the func field since it is
* only used internally by the tracer.
*/
struct boot_trace {
pid_t caller;
char func[KSYM_NAME_LEN];
int result;
unsigned long long duration; /* usecs */
ktime_t calltime;
ktime_t rettime;
};
#ifdef CONFIG_BOOT_TRACER
/* Append the trace on the ring-buffer */
extern void trace_boot(struct boot_trace *it, initcall_t fn);
/* Tells the tracer that smp_pre_initcall is finished.
* So we can start the tracing
*/
extern void start_boot_trace(void);
/* Resume the tracing of other necessary events
* such as sched switches
*/
extern void enable_boot_trace(void);
/* Suspend this tracing. Actually, only sched_switches tracing have
* to be suspended. Initcalls doesn't need it.)
*/
extern void disable_boot_trace(void);
#else
static inline void trace_boot(struct boot_trace *it, initcall_t fn) { }
static inline void start_boot_trace(void) { }
static inline void enable_boot_trace(void) { }
static inline void disable_boot_trace(void) { }
#endif
#endif /* _LINUX_FTRACE_H */

43
include/trace/boot.h Normal file
View File

@ -0,0 +1,43 @@
#ifndef _LINUX_TRACE_BOOT_H
#define _LINUX_TRACE_BOOT_H
/*
* Structure which defines the trace of an initcall.
* You don't have to fill the func field since it is
* only used internally by the tracer.
*/
struct boot_trace {
pid_t caller;
char func[KSYM_NAME_LEN];
int result;
unsigned long long duration; /* usecs */
ktime_t calltime;
ktime_t rettime;
};
#ifdef CONFIG_BOOT_TRACER
/* Append the trace on the ring-buffer */
extern void trace_boot(struct boot_trace *it, initcall_t fn);
/* Tells the tracer that smp_pre_initcall is finished.
* So we can start the tracing
*/
extern void start_boot_trace(void);
/* Resume the tracing of other necessary events
* such as sched switches
*/
extern void enable_boot_trace(void);
/* Suspend this tracing. Actually, only sched_switches tracing have
* to be suspended. Initcalls doesn't need it.)
*/
extern void disable_boot_trace(void);
#else
static inline void trace_boot(struct boot_trace *it, initcall_t fn) { }
static inline void start_boot_trace(void) { }
static inline void enable_boot_trace(void) { }
static inline void disable_boot_trace(void) { }
#endif /* CONFIG_BOOT_TRACER */
#endif /* __LINUX_TRACE_BOOT_H */

1
init/main.c
View File

@ -63,6 +63,7 @@
#include <linux/signal.h>
#include <linux/idr.h>
#include <linux/ftrace.h>
#include <trace/boot.h>
#include <asm/io.h>
#include <asm/bugs.h>

1
kernel/trace/trace.h
View File

@ -8,6 +8,7 @@
#include <linux/ring_buffer.h>
#include <linux/mmiotrace.h>
#include <linux/ftrace.h>
#include <trace/boot.h>
enum trace_type {
__TRACE_FIRST_TYPE = 0,