On Wed, Nov 29, 2000 at 05:24:40PM -0700, Gordon McNutt wrote:
> __start_rtlinux_funcs is, apparently, some kind of implicit macro which
It's a ELF section symbol not a macro.
> references the beginning of the "rtlinux_funcs" section. This section is
> established by the RTLINUX_EXPORT macro used in rtlinux.c. By doing an
> EXPORT_SYMBOL on it, the patch makes it available for the rtl module to
> grab ahold of the rtlinux_funcs section (and all the variable pointers
> stashed there by the RTLINUX_EXPORT macro calls).
>
> Obvious.
Not so obvious to me anywahy, I really had to study what Linus did for the mm
fixup to figure it out. Obvious once you get it. Good analysis.
> Not sure why they don't just EXPORT_SYMBOL the symbols placed in
> rtlinux_funcs. Perhaps if I stare at it some more the reason will appear.
No deep reason other than modularity: we want to keep the rtl symbols
out of the soup of Linux symbols and we sure don't want random modules
latching on to those.
>
> --Gordon
>
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