Re: [PATCH][RFC] disable built-in modules V2

[Magnus Damm <magnus.damm@gmail.com>]

On Apr 7, 2005 4:38 AM, Horst von Brand <vonbrand@inf.utfsm.cl> wrote:
> AsterixTheGaul <asterixthegaul@gmail.com> said:
> > > -#define module_init(x) __initcall(x);
> > > +#define module_init(x) __initcall(x); __module_init_disable(x);
> >
> > It would be better if there is brackets around them... like
> >
> > #define module_init(x) { __initcall(x); __module_init_disable(x); }
> >
> > then we know it wont break some code like
> >
> > if (..)
> >  module_init(x);
> 
> But happily break:
> 
>    if (...)
>     module_init(x);
>    else
>     ...
> 
> This should be:
> 
> #define module_init(x)  do {__initcall(x); __module_init_disable(x);}while(0)

Yes and no. =) Wrapping defines in do {} while(0) is nice when you are
using the defined constants inside functions. module_init() OTOH is
never used inside a function and your suggestion leads to compile
errors:

  CC      arch/i386/kernel/dmi_scan.o
  CC      arch/i386/kernel/bootflag.o
arch/i386/kernel/bootflag.c:99: error: parse error before "do"
arch/i386/kernel/bootflag.c:99: error: parse error before '}' token
make[1]: *** [arch/i386/kernel/bootflag.o] Error 1
make: *** [arch/i386/kernel] Error 2
damm@clementine linux-2.6.12-rc2-disable_builtin $

/ magnus
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