From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?St=E9phane_Chatty?= Subject: Re: [PATCH] Support for 3M multitouch panel Date: Tue, 22 Dec 2009 20:27:39 +0100 Message-ID: <48B39262-E923-4047-8DC4-5E21E666887D@enac.fr> References: <20091211101258.CD35D951F5@smtp.lii-enac-fr> <20091211124226.GD17995@ibawizard.net> <20091211141038.0CBD8951F5@smtp.lii-enac.fr> <20091211223622.GA3067@core.coreip.homeip.net> <694242AB-D4DC-470D-916D-9ADB2B798FBA@enac.fr> <20091222185628.GA28392@core.coreip.homeip.net> Mime-Version: 1.0 (Apple Message framework v752.3) Content-Type: text/plain; charset=ISO-8859-1; delsp=yes format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from 89-230.252-81.static-ip.oleane.fr ([81.252.230.89]:45210 "EHLO smtp.lii-enac.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754170AbZLVT1p convert rfc822-to-8bit (ORCPT ); Tue, 22 Dec 2009 14:27:45 -0500 In-Reply-To: <20091222185628.GA28392@core.coreip.homeip.net> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov Cc: ynezz@true.cz, linux-input@vger.kernel.org Le 22 d=E9c. 09 =E0 19:56, Dmitry Torokhov a =E9crit : > > I meant "read-modify-write" is worse. > > To modify a bitfiled the processor has to fetch data from memory (or > cache if it is in cache) perform a logical operation on it, and store > it back in teh memory. With boolean occupying 1 byte, on most > architectures (older alphas is one exception I know of) var=3Dtrue =20 > can be > done by simple store, no need for "read-modify" part. OK. I had not realized this. My processor architecture courses were =20 too long ago. St. -- To unsubscribe from this list: send the line "unsubscribe linux-input" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html