From: James Hogan <james.hogan@imgtec.com>
Date: Wed, 27 Feb 2013 16:16:38 +0000 (+0000)
Subject: metag: perf: fixes for interrupting perf counters
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~101^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db59932f62386cdfd8510c27a83118c5e915e9ea;p=pandora-kernel.git

metag: perf: fixes for interrupting perf counters

The overflow handler needs to read modify write when re-enabling the
counter so as not to change the counter value as it may have been
changed to ready the next interrupt on overflow. Similarly for
interrupting counters metag_pmu_enable_counter needs to leave the
counter value unchanged rather than resetting it to zero.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
---

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