linux-kernel - Re: [PATCH 01/31] Add an ERR_CAST() macro to complement ERR

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Message-ID: <47212215.8080003@oracle.com>
Date:	Thu, 25 Oct 2007 16:09:09 -0700
From:	Zach Brown <zach.brown@...cle.com>
To:	David Howells <dhowells@...hat.com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 01/31] Add an ERR_CAST() macro to complement ERR_PTR and
 co.	[try #5]


> + * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type
> + * @ptr: The pointer to cast.
> + *
> + * Explicitly cast an error-valued pointer to another pointer type in such a
> + * way as to make it clear that's what's going on.
> + */
> +static inline void *ERR_CAST(const void *ptr)
> +{
> +	return (void *) ptr;
> +}

Just to nit, surely you don't need the cast inside the function.  The
casting happens at the call site between the argument and returned pointer.

- z
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