2010/1/2 Shawn <citypw@xxxxxxxxx>:
> hello guys,
> I got a newbie confused when I was looking into the source code of
> s3c2440's RTC driver.I dont know what is __v excatly means.anyone can
> tell?thanks anyway!
>
> #define readb(c) ({ __u8 __v = __raw_readb(__mem_pci(c)); __v; })
>
> --
> GNU powered it...
> GPL protect it...
> God blessing it...
>
> regards
> HFG--Shawn the R0ck
>
notice "{ ... }"
It's code block, and __v is its last value
when you use readb link
somevar = readb(someport)
then __v is return to set somevar
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