From: Jaswinder Singh Rajput <jaswinder@kernel.org>
Date: Sat, 27 Jun 2009 18:19:09 +0000 (+0530)
Subject: perf stat: Micro-optimize the code: memcpy is only required if no event is selected... 
X-Git-Tag: v2.6.31-rc2~30^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3043569dc8fbe9228b76174f15d1a7152c48a20;p=pandora-kernel.git

perf stat: Micro-optimize the code: memcpy is only required if no event is selected and !null_run

Set attrs and nr_counters if no event is selected and !null_run.

Setting of attrs should depend on number of counters,
so we need to memcpy only for sizeof(default_attrs)

Also set nr_counters as ARRAY_SIZE(default_attrs) in place of
hardcoded value.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1246126749.32198.16.camel@hpdv5.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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