> > I am not a C expert so can someone tell me what the
> benifits
> >/ disadvantages of the following lines of code are if there
> are
> >any? The reason I am writning these lists is that I found
> this
> >code in the kernel..
> >
> >#include <asm/irq.h>
> >#include <asm/system.h>
> >#include <asm/irq.h>
>
> There are no benefits. However there are no problems either.
> Most C header files contain preprocessor directives which
> surround the entire header file and protect it against
> multiple
> inclusion. For example:
>
> #ifndef __MYHEADER_H__
> #define __MYHEADER_H__
>
> (Headerfile contents go here)
>
> #endif /* __MY_HEADER_H__ */
>
> The only thing multiple inclusion does in this case is it
> makes
> the kernel code a bit sloppier, but it doesn't affect anything
> so
> long as the headers all have multiple inclusion protection as
> above.
>
> --
> Mike A. Harris Linux advocate GNU
> advocate
> Computer Consultant Open Source
> advocate
>
> Tea, Earl Grey, Hot...
>
>
>
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