[Xen-devel] One issue in kill_timer

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

Currently kill_timer assume the timer is either active/inactive. However, 
sometimes caller have called kill_timer already. The latter one may cause crash 
because the timer's list has been delted and cause list_del(&timer->inactive) 
failed. 

BTW, I'm curios why TIMER_STATUS_killed > TIMER_STATUS_inactive? Per my 
understanding, the timer status should be invalid->uninitied->inactive->active 
(heap or list), so IMO TIMER_STATUS_killed should be < TIMER_STATUS_inactive.

Thanks
--jyh


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