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Commit ebf31f50 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

jump_label: Add COND_STMT(), reducer wrappery 



The use of the JUMP_LABEL() construct ends up creating endless silly
wrappers, create a higher level construct to reduce this clutter.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <new-submission>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7e54a5a0

include/linux/jump_label.h

+10 −0
Original line number Diff line number Diff line
@@ -61,4 +61,14 @@ static inline int jump_label_text_reserved(void *start, void *end) 


#endif



#define COND_STMT(key, stmt)					\

do {								\

	__label__ jl_enabled;					\

	JUMP_LABEL(key, jl_enabled);				\

	if (0) {						\

jl_enabled:							\

		stmt;						\

	}							\

} while (0)



#endif

include/linux/perf_event.h

+2 −10
Original line number Diff line number Diff line
@@ -903,21 +903,13 @@ extern atomic_t perf_task_events; 


static inline void perf_event_task_sched_in(struct task_struct *task)

{

	JUMP_LABEL(&perf_task_events, have_events);

	return;



have_events:

	__perf_event_task_sched_in(task);

	COND_STMT(&perf_task_events, __perf_event_task_sched_in(task));

}



static inline

void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)

{

	JUMP_LABEL(&perf_task_events, have_events);

	return;



have_events:

	__perf_event_task_sched_out(task, next);

	COND_STMT(&perf_task_events, __perf_event_task_sched_out(task, next));

}



extern int perf_event_init_task(struct task_struct *child);