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: 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>
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@ -61,4 +61,14 @@ static inline int jump_label_text_reserved(void *start, void *end)
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#endif
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#define COND_STMT(key, stmt) \
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do { \
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__label__ jl_enabled; \
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JUMP_LABEL(key, jl_enabled); \
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if (0) { \
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jl_enabled: \
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stmt; \
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} \
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} while (0)
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#endif
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@ -903,21 +903,13 @@ extern atomic_t perf_task_events;
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static inline void perf_event_task_sched_in(struct task_struct *task)
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{
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JUMP_LABEL(&perf_task_events, have_events);
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return;
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have_events:
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__perf_event_task_sched_in(task);
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COND_STMT(&perf_task_events, __perf_event_task_sched_in(task));
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}
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static inline
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void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)
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{
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JUMP_LABEL(&perf_task_events, have_events);
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return;
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have_events:
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__perf_event_task_sched_out(task, next);
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COND_STMT(&perf_task_events, __perf_event_task_sched_out(task, next));
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}
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extern int perf_event_init_task(struct task_struct *child);
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