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i386: fix NMI watchdog not reserving its MSRs

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At system boot time, the NMI watchdog no longer reserved its MSRs, allowing
other subsystems to mess with them.  Fix that.

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Björn Steinbrink 2007-06-16 10:15:55 -07:00 committed by Linus Torvalds
parent 38ad2ed08d
commit faa4cfa6b3
1 changed files with 6 additions and 0 deletions
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6
arch/i386/kernel/cpu/perfctr-watchdog.c
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@ -614,6 +614,12 @@ int lapic_watchdog_init(unsigned nmi_hz)
probe_nmi_watchdog();
if (!wd_ops)
return -1;
if (!wd_ops->reserve()) {
printk(KERN_ERR
"NMI watchdog: cannot reserve perfctrs\n");
return -1;
}
}
if (!(wd_ops->setup(nmi_hz))) {