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sparc64: Manage NMI watchdog enabling like x86.
authorDavid S. Miller <davem@davemloft.net>
Wed, 9 Sep 2009 06:16:06 +0000 (23:16 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 9 Sep 2009 06:16:06 +0000 (23:16 -0700)
Use a per-cpu 'wd_enabled' boolean and a global atomic_t count
of watchdog NMI enabled cpus which is set to '-1' if something
is wrong with the watchdog and it can't be used.

Signed-off-by: David S. Miller <davem@davemloft.net>

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