On Sat, 27 Jan 2007 13:01:08 +0100 Bodo Eggert wrote:
> Fengguang Wu <[email protected]> wrote:
>
> > The new/old ra class were implicitly stored in low bits of
> > file_ra_state.flags. Now make the data structure obvious, and remove the
> > coding tricks.
>
> > +++ linux-2.6.20-rc4-mm1/include/linux/fs.h
>
> > - unsigned long flags; /* RA_FLAG_xxx | ra_class_old | ra_class_new */
> > + union {
> > + unsigned long flags; /* RA_FLAG_xxx | class_old | class_new */
> > + struct {
> > + u8 class_new;
> > + u8 class_old;
>
> This doesn't work on big endiam machines, does it?
>
> IMO you should use a bitfield instead.
Or "use bit masks instead" since
"The order of allocation of bit-fields within a unit (high-order to
low-order or low-order to high-order) is implementation-defined."
---
~Randy
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