From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 23 Jan 2001 05:32:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 23 Jan 2001 05:31:46 -0500 Received: from c017-h014.c017.sfo.cp.net ([209.228.12.228]:16330 "HELO c017.sfo.cp.net") by vger.kernel.org with SMTP id ; Tue, 23 Jan 2001 05:31:36 -0500 X-Sent: 23 Jan 2001 10:31:29 GMT Message-ID: <3A6D5D28.C132D416@sangate.com> Date: Tue, 23 Jan 2001 12:30:00 +0200 From: Mark Mokryn Organization: SANgate Systems X-Mailer: Mozilla 4.75 [en] (X11; U; Linux 2.2.16-22 i686) X-Accept-Language: en MIME-Version: 1.0 To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: ioremap_nocache problem? 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 ioremap_nocache does the following: return __ioremap(offset, size, _PAGE_PCD); However, in drivers/char/mem.c (2.4.0), we see the following: /* On PPro and successors, PCD alone doesn't always mean uncached because of interactions with the MTRRs. PCD | PWT means definitely uncached. */ if (boot_cpu_data.x86 > 3) prot |= _PAGE_PCD | _PAGE_PWT; Does this mean ioremap_nocache() may not do the job? -mark - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/