Re: p = kmalloc(sizeof(*p), )

[Randy.Dunlap]

On Sun, 18 Sep 2005 12:32:26 -0400 Robert Love wrote:

> On Sun, 2005-09-18 at 11:06 +0100, Russell King wrote:
> 
> > +The preferred form for passing a size of a struct is the following:
> > +
> > +       p = kmalloc(sizeof(*p), ...);
> > +
> > +The alternative form where struct name is spelled out hurts readability and
> > +introduces an opportunity for a bug when the pointer variable type is changed
> > +but the corresponding sizeof that is passed to a memory allocator is not.
> 
> Agreed.
> 
> Also, after Alan's #4:
> 
> 5.  Contrary to the above statement, such coding style does not help,
>     but in fact hurts, readability.  How on Earth is sizeof(*p) more
>     readable and information-rich than sizeof(struct foo)?  It looks
>     like the remains of a 5,000 year old wolverine's spleen and
>     conveys no information about the type of the object that is being
>     created.

I also dislike & disagree with the CodingStyle addition....


---
~Randy
You can't do anything without having to do something else first.
-- Belefant's Law
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/