perf_counter: Split the mmap control page in two parts
Since there are two distinct sections to the control page,
move them apart so that possible extentions don't overlap.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index e7213e4..489d5cb 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -233,6 +233,12 @@
__u32 index; /* hardware counter identifier */
__s64 offset; /* add to hardware counter value */
+ /*
+ * Hole for extension of the self monitor capabilities
+ */
+
+ __u64 __reserved[125]; /* align to 1k */
+
/*
* Control data for the mmap() data buffer.
*