perf_counter: Rename L2 to LL cache

The top (fastest) and last level (biggest) caches are the most
interesting ones, performance wise.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
[ Fixed the Nehalem LL table to LLC Reference/Miss events ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 887df88..20cf5af 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -56,14 +56,14 @@
 /*
  * Generalized hardware cache counters:
  *
- *       { L1-D, L1-I, L2, LLC, ITLB, DTLB, BPU } x
+ *       { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
  *       { read, write, prefetch } x
  *       { accesses, misses }
  */
 enum perf_hw_cache_id {
 	PERF_COUNT_HW_CACHE_L1D		= 0,
 	PERF_COUNT_HW_CACHE_L1I		= 1,
-	PERF_COUNT_HW_CACHE_L2		= 2,
+	PERF_COUNT_HW_CACHE_LL		= 2,
 	PERF_COUNT_HW_CACHE_DTLB	= 3,
 	PERF_COUNT_HW_CACHE_ITLB	= 4,
 	PERF_COUNT_HW_CACHE_BPU		= 5,