bitops for handling 32 bits

[Manavendra Nath Manav]

On Tue 28 Jul, 2015 20:24 Kevin Wilson <wkevils at gmail.com> wrote:

> Hi all,
> Is there a kernel API for handling 32 bits ?
> I see a macro like BIT(nr)
> http://lxr.free-electrons.com/source/include/linux/bitops.h#L6
>
> #define BIT(nr)                 (1UL << (nr))
>
> and also
> #define BIT_ULL(nr)             (1ULL << (nr))
>
> However, these macros are using 64 bit semantics, so if I will use
> them with 32 bits values
> the results will  be wrong.
>
> Any ideas ?
>
> Regards,
> Kevin
>
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The macros don't do type checking so it will work for both 32-bit and
64-bit.
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