Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 5 Mar 2002 18:38:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 5 Mar 2002 18:38:16 -0500 Received: from k7g317-2.kam.afb.lu.se ([130.235.57.218]:6412 "EHLO cheetah.psv.nu") by vger.kernel.org with ESMTP id ; Tue, 5 Mar 2002 18:38:07 -0500 Date: Wed, 6 Mar 2002 00:37:56 +0100 (CET) From: Peter Svensson To: Davide Libenzi cc: Hubertus Franke , Rusty Russell , Linux Kernel Mailing List Subject: Re: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores) In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 5 Mar 2002, Davide Libenzi wrote: > > I believe not all machine have alignof == sizeof > > Yes but this is always true alignof >= sizeof No, this is not true. As the gcc info pages says: For example, if the target machine requires a `double' value to be aligned on an 8-byte boundary, then `__alignof__ (double)' is 8. This is true on many RISC machines. On more traditional machine designs, `__alignof__ (double)' is 4 or even 2. A later example shows situations where alignof>sizeof. Peter -- Peter Svensson ! Pgp key available by finger, fingerprint: ! 8A E9 20 98 C1 FF 43 E3 07 FD B9 0A 80 72 70 AF ------------------------------------------------------------------------ Remember, Luke, your source will be with you... always... - 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/