From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Tue, 5 May 2009 15:50:23 +0000 (+0200)
Subject: perf_counter: add ioctl(PERF_COUNTER_IOC_RESET)
X-Git-Tag: v2.6.31-rc1~383^2~300
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6de6a7b95705b859b61430fa3afa1403034eb3e6;p=pandora-kernel.git

perf_counter: add ioctl(PERF_COUNTER_IOC_RESET)

Provide a way to reset an existing counter - this eases PAPI
libraries around perfcounters.

Similar to read() it doesn't collapse pending child counters.

[ Impact: new perfcounter fd ioctl method to reset counters ]

Suggested-by: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20090505155437.022272933@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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