[LinuxPPS] Suggestions needed

[Udo van den Heuvel]

Rodolfo Giometti wrote:
> here a letter from Andrew Morton (kernel guru) where he asks to me to
> modify the PPS register/unregister procedure.
> 
> Can someone suggest a good solution as Andrew asks for? :)

Yes.
Add a flag to a struct of somesuch (which struct needs to be modified).
On entry of procedure set the flag if unset.
If already set: fail
modify data in struct, whatever
Clear flag.

This means that the struct can only be modified by one instance only. (?!)