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jump_label: Add COND_STMT(), reducer wrappery

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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: Peter 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: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-10-17 12:15:00 +02:00 committed by Ingo Molnar
parent 7e54a5a0b6
commit ebf31f5024
2 changed files with 12 additions and 10 deletions
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10
include/linux/jump_label.h
View file

@ -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

12
include/linux/perf_event.h
View file

@ -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);