From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE3C9C2BB1D for ; Fri, 17 Apr 2020 23:02:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B33DE214D8 for ; Fri, 17 Apr 2020 23:02:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727902AbgDQXCR (ORCPT ); Fri, 17 Apr 2020 19:02:17 -0400 Received: from baldur.buserror.net ([165.227.176.147]:41828 "EHLO baldur.buserror.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725953AbgDQXCR (ORCPT ); Fri, 17 Apr 2020 19:02:17 -0400 Received: from [2601:449:8480:af0:12bf:48ff:fe84:c9a0] by baldur.buserror.net with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1jPZzx-0007Uz-49; Fri, 17 Apr 2020 18:02:14 -0500 Message-ID: <1f05e37b5aa52aad44d4310edfdc6b36894cb964.camel@buserror.net> From: Scott Wood To: Wang Wenhu , gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: christophe.leroy@c-s.fr, kernel@vivo.com, robh@kernel.org, Michael Ellerman Date: Fri, 17 Apr 2020 18:02:12 -0500 In-Reply-To: <20200417172130.14287-1-wenhu.wang@vivo.com> References: <20200417172130.14287-1-wenhu.wang@vivo.com> Organization: Red Hat Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 2601:449:8480:af0:12bf:48ff:fe84:c9a0 X-SA-Exim-Rcpt-To: wenhu.wang@vivo.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, christophe.leroy@c-s.fr, kernel@vivo.com, robh@kernel.org, mpe@ellerman.id.au X-SA-Exim-Mail-From: oss@buserror.net Subject: Re: [PATCH] drivers: uio: new driver uio_fsl_85xx_cache_sram X-SA-Exim-Version: 4.2.1 (built Tue, 02 Aug 2016 21:08:31 +0000) X-SA-Exim-Scanned: Yes (on baldur.buserror.net) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2020-04-17 at 10:21 -0700, Wang Wenhu wrote: > Implements a new uio driver for freescale 85xx platforms to access > the Cache-Sram form user level. It is extremely helpful for the user > space applications that require high performance memory accesses. > > Cc: Greg Kroah-Hartman > Cc: Christophe Leroy > Cc: Scott Wood > Cc: Michael Ellerman > Cc: linuxppc-dev@lists.ozlabs.org > Signed-off-by: Wang Wenhu > --- > drivers/uio/Kconfig | 8 + > drivers/uio/Makefile | 1 + > drivers/uio/uio_fsl_85xx_cache_sram.c | 407 ++++++++++++++++++++++++++ > 3 files changed, 416 insertions(+) > create mode 100644 drivers/uio/uio_fsl_85xx_cache_sram.c NACK, we don't need two copies of this code in the kernel. Please just wait a bit and I'll send a patch to have the existing driver expose a dynamic allocation interface to userspace. -Scott