perf_counter: fix nmi-watchdog interaction

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When we don't have any perf-counters active, don't act like we know
what the NMI is for.

[ Impact: fix hard hang with nmi_watchdog=2 ]

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090501102533.109867793@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Peter Zijlstra 2009-05-01 12:23:17 +02:00 • committed by Ingo Molnar

parent c33a0bc4e4

commit 63a809a2dc

1 changed files with 3 additions and 0 deletions

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arch/x86/kernel/cpu/perf_counter.c

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