From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 6 Aug 2009 11:16:44 +0000 (+1000)
Subject: perf_counter/powerpc: Check oprofile_cpu_type for NULL before using it
X-Git-Tag: v2.6.31-rc6~44^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0d82a0a4e9841b787e6431ccfbb515546c55dc2;p=pandora-kernel.git

perf_counter/powerpc: Check oprofile_cpu_type for NULL before using it

If the current CPU doesn't support performance counters,
cur_cpu_spec->oprofile_cpu_type can be NULL. The current
perf_counter modules don't test for that case and would thus
crash at boot time.

Bug reported by David Woodhouse.

Reported-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Paul Mackerras <paulus@samba.org>
LKML-Reference: <19066.48028.446975.501454@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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