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ring-buffer: Always inline rb_event_data() 

The rb_event_data() is the fast path of getting the ring buffer data from an
event. Externally, ring_buffer_event_data() is used to access this function.
But unfortunately, rb_event_data() is not inlined, and calling
ring_buffer_event_data() causes that function to be called again. Force
rb_event_data() to be inlined to lower the number of operations needed when
calling ring_buffer_event_data().

Link: http://lkml.kernel.org/r/20161121183700.GW26852@two.firstfloor.org

Reported-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2016-11-23 11:40:34 -05:00 committed by Steven Rostedt
parent fa7ffb39ef
commit 929ddbf3ef
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/ring_buffer.c
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@ -245,7 +245,7 @@ unsigned ring_buffer_event_length(struct ring_buffer_event *event)
EXPORT_SYMBOL_GPL(ring_buffer_event_length);
/* inline for ring buffer fast paths */
static void *
static __always_inline void *
rb_event_data(struct ring_buffer_event *event)
{
if (event->type_len == RINGBUF_TYPE_TIME_EXTEND)