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Commit 82f60f0b authored by Ingo Molnar's avatar Ingo Molnar
Browse files

tracing/function-return-tracer: clean up task start/exit callbacks 



Impact: cleanup

Eliminate #ifdefs in core code by using empty inline functions.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f201ae23

include/linux/ftrace.h

+3 −0
Original line number Diff line number Diff line
@@ -335,6 +335,9 @@ extern void unregister_ftrace_return(void); 


extern void ftrace_retfunc_init_task(struct task_struct *t);

extern void ftrace_retfunc_exit_task(struct task_struct *t);

#else

static inline void ftrace_retfunc_init_task(struct task_struct *t) { }

static inline void ftrace_retfunc_exit_task(struct task_struct *t) { }

#endif



#endif /* _LINUX_FTRACE_H */

kernel/exit.c

+0 −2
Original line number Diff line number Diff line
@@ -1128,9 +1128,7 @@ NORET_TYPE void do_exit(long code) 
	preempt_disable();

	/* causes final put_task_struct in finish_task_switch(). */

	tsk->state = TASK_DEAD;

#ifdef CONFIG_FUNCTION_RET_TRACER

	ftrace_retfunc_exit_task(tsk);

#endif

	schedule();

	BUG();

	/* Avoid "noreturn function does return".  */

kernel/fork.c

+0 −2
Original line number Diff line number Diff line
@@ -1270,9 +1270,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, 
	total_forks++;

	spin_unlock(&current->sighand->siglock);

	write_unlock_irq(&tasklist_lock);

#ifdef CONFIG_FUNCTION_RET_TRACER

	ftrace_retfunc_init_task(p);

#endif

	proc_fork_connector(p);

	cgroup_post_fork(p);

	return p;

kernel/sched.c

+0 −2
Original line number Diff line number Diff line
@@ -5901,9 +5901,7 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu) 
	 * The idle tasks have their own, simple scheduling class:

	 */

	idle->sched_class = &idle_sched_class;

#ifdef CONFIG_FUNCTION_RET_TRACER

	ftrace_retfunc_init_task(idle);

#endif

}



/*