[PATCH 2/4] ring_buffer: Export for_each_buffer_cpu()
From: Richard Weinberger <richard@nod.at>
Date: 2012-02-10 22:12:20
Also in:
lkml, netfilter-devel
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
In order to make ring_buffer usable to other modules for_each_buffer_cpu() needs to be exported. Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Steven Rostedt <rostedt@goodmis.org> --- include/linux/ring_buffer.h | 5 +++++ kernel/trace/ring_buffer.c | 7 +++++++ 2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index 67be037..5c1c29f 100644
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h@@ -185,4 +185,9 @@ enum ring_buffer_flags { RB_FL_OVERWRITE = 1 << 0, }; +cpumask_var_t *ring_buffer_mask(struct ring_buffer *buffer); + +#define for_each_buffer_cpu(buffer, cpu) \ + for_each_cpu(cpu, *(ring_buffer_mask(buffer))) + #endif /* _LINUX_RING_BUFFER_H */
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index f5b7b5c..a4117c5 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c@@ -348,6 +348,7 @@ void *ring_buffer_event_data(struct ring_buffer_event *event) } EXPORT_SYMBOL_GPL(ring_buffer_event_data); +#undef for_each_buffer_cpu #define for_each_buffer_cpu(buffer, cpu) \ for_each_cpu(cpu, buffer->cpumask)
@@ -4139,3 +4140,9 @@ static int rb_cpu_notify(struct notifier_block *self, return NOTIFY_OK; } #endif + +cpumask_var_t *ring_buffer_mask(struct ring_buffer *buffer) +{ + return &buffer->cpumask; +} +EXPORT_SYMBOL_GPL(ring_buffer_mask);
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1.7.7.3