Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760898AbXJYXrc (ORCPT ); Thu, 25 Oct 2007 19:47:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753238AbXJYXrY (ORCPT ); Thu, 25 Oct 2007 19:47:24 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:36642 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751684AbXJYXrW (ORCPT ); Thu, 25 Oct 2007 19:47:22 -0400 Date: Thu, 25 Oct 2007 16:46:58 -0700 From: Andrew Morton To: Zach Brown Cc: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH 01/31] Add an ERR_CAST() macro to complement ERR_PTR and co. [try #5] Message-Id: <20071025164658.8fdc04cc.akpm@linux-foundation.org> In-Reply-To: <47212215.8080003@oracle.com> References: <20071025163352.5057.59344.stgit@warthog.procyon.org.uk> <20071025163357.5057.35399.stgit@warthog.procyon.org.uk> <47212215.8080003@oracle.com> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1057 Lines: 37 On Thu, 25 Oct 2007 16:09:09 -0700 Zach Brown wrote: > > > + * 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. > It'll warn without the cast. btw, nit time. This style: return (void *)ptr; outnumbers this style return (void *) ptr; by 4 to 1. And I don't find the space attractive, useful or logical, personally. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/