Purpose of sync() function

[David Woodhouse]

fgiasson at mediatrix.com said:
>   I have not implemented the sync() function, because looking at
> others drivers it doest not seem to do anything useful.  Can anyone
> tell me if I am right or wrong, and what should be the purpose of the
> sync function^ 

The sync function should wait for all pending erases to complete. As 
nobody's actually implemented asynchronous erases yet - all the erase 
functions block and call the callback before returning, this is a NOP in 
all current drivers.

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dwmw2