Attilio Rao 91a1929f07 Handle a race between device_pager and devsw in a more graceful manner:
return an error code rather than panic the kernel.

Sponsored by:	Sandvine Incorporated
Reviewed by:	kib
Tested by:	pho
MFC after:	2 weeks
2011-07-06 15:09:52 +00:00
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2011-06-26 01:32:46 +00:00
MFC
2011-06-28 14:40:17 +00:00
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2011-05-22 09:58:48 +00:00
MFC
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2011-07-06 09:43:25 +00:00
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