Re: deleting timer that re-registers itself

[Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>]

I think there can be a situation like:

         processA:                  processB:
0ns:  if (!exiting)
1ns:                                    exiting = 1;
2ns:                                    del_timer
3ns:  mod_timer

so spinlock seems better for this.

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