From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Weinberger Subject: VERIFY_READ/WRITE in uaccess.h? Date: Sun, 10 May 2015 11:44:44 +0200 Message-ID: <554F288C.3000300@nod.at> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Return-path: Received: from a.ns.miles-group.at ([95.130.255.143]:65276 "EHLO radon.swed.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752195AbbEJJos (ORCPT ); Sun, 10 May 2015 05:44:48 -0400 Sender: linux-arch-owner@vger.kernel.org List-ID: To: Linux-Arch Cc: "linux-kernel@vger.kernel.org" , Linus Torvalds , Arnd Bergmann Hi! While cleaning up UML's uaccess code I've noticed that not a single architecture is using VERIFY_READ/WRITE in access_ok(). One exception is UML, it uses the access type in one check which is in vain anyways. Also asm-generic/uaccess.h drops the type parameter silently. Why do we still carry it around? Is it because we want it for some future architecture which can benefit from it or just because nobody cared enough to do a tree-wide cleanup? I fear it is the latter... ;) Thanks, //richard