Re: [PATCH 02/13] hrtimer: remove useless const

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Mon, 13 Feb 2006, Andrew Morton wrote:

> Roman Zippel <zippel@linux-m68k.org> wrote:
>>
>> On Mon, 13 Feb 2006, Andrew Morton wrote:
>>
>> > const arguments to functions are pretty useful for code readability and
>> > maintainability too, if you use them consistently.
>>
>>  I could understand that argument, if gcc would warn about it in any way.
>
> It does.  If a function tries to modify a formal argument which was marked
> const you'll get a warning.
>
> We're talking about different things here.  My point is that it is
> perverted and evil for a function to modify its own args (unless it's very
> small and simple), and a const declaration is a useful way for a
> maintenance programmer to be assured that nobody has done perverted and
> evil things to a function.
> -

This is evil????

void foo(int len)
{
     while(len--)
         do_something();
}

I don't think so. The function already owns "len". Why should it
create another copy?

Cheers,
Dick Johnson
Penguin : Linux version 2.6.13.4 on an i686 machine (5589.66 BogoMips).
Warning : 98.36% of all statistics are fiction.
_


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