diff mbox

[2/4] ring_buffer: Export for_each_buffer_cpu()

Message ID 1328911856-19260-5-git-send-email-richard@nod.at
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Richard Weinberger Feb. 10, 2012, 10:10 p.m. UTC 
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(-)

Comments

Pablo Neira Ayuso Feb. 14, 2012, 12:05 a.m. UTC | #1 
On Fri, Feb 10, 2012 at 11:10:54PM +0100, Richard Weinberger wrote:
> 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>

I've taken this one as well since we need it for the ring_buffer
support for your extension for xt_LOG.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

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);