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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E92E4C76195 for ; Mon, 27 Mar 2023 13:38:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NptA98pmb5J6npBhTY9ECvgfW8iPxmf0GaTwteUnGYM=; b=FjGXt14ajaS27N DHUpjhlglnVzmN3UQlfcNS/RYYprqO78ZPb5oNq6iEYNlaCauE9CPwZJBcYLkD04sY7iaVGzqmZ67 92zaCM+lUo69Iw0jsHqI1m+cirxw41BmsJ/1b1y7m/z8xldosRn7iyX24VTHsD2NwbDCiFJyZnc2a +S18vKk6jLWagdG5ACMpJrcH1JQDxl/XsrXD1ViywwYSpByLtsaWT8ykPCI1WGQ9kNwFhaLx58Zce j2t160dEN3qFBb4odk+jbSDwF7EI03BZRgFi3ghjfzJOlYEUHpDaGSHz2Cktl0P+yD9qfmXc8lPHl kcNDFTfvb8x3VpBivJxQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pgn2u-00B9JR-33; Mon, 27 Mar 2023 13:38:00 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pgn2r-00B9IM-1J; Mon, 27 Mar 2023 13:37:58 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 86F8C61290; Mon, 27 Mar 2023 13:37:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EDB6DC4339C; Mon, 27 Mar 2023 13:37:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679924276; bh=sKw5GnPYWTx1tEo+IYG63yzmzH5uUSkHi5W70RXeiXE=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=Or5bYP6asvBi3DIpTvEDxCFWIn2Cdch8Z5XdxQI6zEoEgJRZqrecdpv7paLYKT9CC ykTFqWwusdSTCL1jiwj6kNclHXsXGO9Z8Pgkx7W7viSa5CpCaPtlyRvpzazCaoEuAl ON63aoYpCrVIWtjBx0qMwiWtOPd+kCdAaYbmijioiOFv8Xk/z7uUP1W0Z3J67+Uczj eiWgDOj8fZ+i/pe8lRkJZPQBpygL51cztm9uvH3QS8WYX5TkpZllEvJLjYFEuEB3rP MooCMJzwn6fbb9SnJ9RBXy+iRWjhvjn2PfTrafIOUz6E5Yp51QeINLA4MxBUmdB567 RtP9F30M7zWeA== Received: by mail-lf1-f47.google.com with SMTP id q16so11475564lfe.10; Mon, 27 Mar 2023 06:37:55 -0700 (PDT) X-Gm-Message-State: AAQBX9f7UyXp5cYQuNXPWtC2ZVeNgppfw/+3p63Qj3A5cH8IRqbtpgqO nbBScUr3QlQjD41MDgy7BMxPswdNSPjQvMy9zsk= X-Google-Smtp-Source: AKy350aPL1uQ3r2MblLdeWPWx+R7rA3ZaUJTGPp0hWqhXUlS0wDj97jvk8gg6F5BBuMMpzVJHH5p6CMaiE85EcR30Es= X-Received: by 2002:a17:906:4746:b0:8ab:b606:9728 with SMTP id j6-20020a170906474600b008abb6069728mr5893837ejs.5.1679924253534; Mon, 27 Mar 2023 06:37:33 -0700 (PDT) MIME-Version: 1.0 References: <20230327121317.4081816-1-arnd@kernel.org> <20230327121317.4081816-11-arnd@kernel.org> In-Reply-To: <20230327121317.4081816-11-arnd@kernel.org> From: Guo Ren Date: Mon, 27 Mar 2023 21:37:22 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 10/21] csky: dma-mapping: skip invalidating before DMA from device To: Arnd Bergmann Cc: linux-kernel@vger.kernel.org, Arnd Bergmann , Vineet Gupta , Russell King , Neil Armstrong , Linus Walleij , Catalin Marinas , Will Deacon , Brian Cain , Geert Uytterhoeven , Michal Simek , Thomas Bogendoerfer , Dinh Nguyen , Stafford Horne , Helge Deller , Michael Ellerman , Christophe Leroy , Paul Walmsley , Palmer Dabbelt , Rich Felker , John Paul Adrian Glaubitz , "David S. Miller" , Max Filippov , Christoph Hellwig , Robin Murphy , Lad Prabhakar , Conor Dooley , linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-oxnas@groups.io, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230327_063757_520341_67D91784 X-CRM114-Status: GOOD ( 20.79 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org T24gTW9uLCBNYXIgMjcsIDIwMjMgYXQgODoxNeKAr1BNIEFybmQgQmVyZ21hbm4gPGFybmRAa2Vy bmVsLm9yZz4gd3JvdGU6Cj4KPiBGcm9tOiBBcm5kIEJlcmdtYW5uIDxhcm5kQGFybmRiLmRlPgo+ Cj4gY3NreSBpcyB0aGUgb25seSBhcmNoaXRlY3R1cmUgdGhhdCBkb2VzIGEgZnVsbCBmbHVzaCBm b3IgdGhlCj4gZG1hX3N5bmNfKl9mb3JfZGV2aWNlKC4uLiwgRE1BX0ZST01fREVWSUNFKSBvcGVy YXRpb24uIFRoZSByZXF1aXJlbWVudAo+IGlzIG9ubHkgbWFrZSBzdXJlIHRoZXJlIGFyZSBubyBk aXJ0eSBjYWNoZSBsaW5lcyBmb3IgdGhlIGJ1ZmZlciwKPiB3aGljaCBjYW4gYmUgZWl0aGVyIGRv bmUgdGhyb3VnaCBhbiBpbnZhbGlkYXRlIG9wZXJhdGlvbiAoYXMgb24gbW9zdAo+IGFyY2hpdGVj dHVyZXMgaW5jbHVkaW5nIGFybTMyLCBtaXBzIGFuZCBhcmMpLCBvciBhIHdyaXRlYmFjayAoYXMg b24KPiBhcm02NCBhbmQgcmlzY3YpLiBUaGUgY2FjaGUgYWxzbyBoYXMgdG8gYmUgaW52YWxpZGF0 ZWQgZXZlbnR1YWxseSBidXQKPiBjc2t5IGFscmVhZHkgZG9lcyB0aGF0IGFmdGVyIHRoZSB0cmFu c2Zlci4KPgo+IFVzZSBhICdjbGVhbicgb3BlcmF0aW9uIGhlcmUgZm9yIGNvbnNpc3RlbmN5IHdp dGggYXJtNjQgYW5kIHJpc2N2Lgo+Cj4gU2lnbmVkLW9mZi1ieTogQXJuZCBCZXJnbWFubiA8YXJu ZEBhcm5kYi5kZT4KPiAtLS0KPiAgYXJjaC9jc2t5L21tL2RtYS1tYXBwaW5nLmMgfCA0ICstLS0K PiAgMSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0aW9uKCspLCAzIGRlbGV0aW9ucygtKQo+Cj4gZGlm ZiAtLWdpdCBhL2FyY2gvY3NreS9tbS9kbWEtbWFwcGluZy5jIGIvYXJjaC9jc2t5L21tL2RtYS1t YXBwaW5nLmMKPiBpbmRleCA4MjQ0NzAyOWZlYjQuLmM5MGY5MTJlMjgyMiAxMDA2NDQKPiAtLS0g YS9hcmNoL2Nza3kvbW0vZG1hLW1hcHBpbmcuYwo+ICsrKyBiL2FyY2gvY3NreS9tbS9kbWEtbWFw cGluZy5jCj4gQEAgLTYwLDExICs2MCw5IEBAIHZvaWQgYXJjaF9zeW5jX2RtYV9mb3JfZGV2aWNl KHBoeXNfYWRkcl90IHBhZGRyLCBzaXplX3Qgc2l6ZSwKPiAgewo+ICAgICAgICAgc3dpdGNoIChk aXIpIHsKPiAgICAgICAgIGNhc2UgRE1BX1RPX0RFVklDRToKPiAtICAgICAgICAgICAgICAgY2Fj aGVfb3AocGFkZHIsIHNpemUsIGRtYV93Yl9yYW5nZSk7Cj4gLSAgICAgICAgICAgICAgIGJyZWFr Owo+ICAgICAgICAgY2FzZSBETUFfRlJPTV9ERVZJQ0U6Cj4gICAgICAgICBjYXNlIERNQV9CSURJ UkVDVElPTkFMOgo+IC0gICAgICAgICAgICAgICBjYWNoZV9vcChwYWRkciwgc2l6ZSwgZG1hX3di aW52X3JhbmdlKTsKPiArICAgICAgICAgICAgICAgY2FjaGVfb3AocGFkZHIsIHNpemUsIGRtYV93 Yl9yYW5nZSk7ClJldmlld2VkLWJ5OiBHdW8gUmVuIDxndW9yZW5Aa2VybmVsLm9yZz4KCgo+ICAg ICAgICAgICAgICAgICBicmVhazsKPiAgICAgICAgIGRlZmF1bHQ6Cj4gICAgICAgICAgICAgICAg IEJVRygpOwo+IC0tCj4gMi4zOS4yCj4KCgotLSAKQmVzdCBSZWdhcmRzCiBHdW8gUmVuCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1zbnBzLWFy YyBtYWlsaW5nIGxpc3QKbGludXgtc25wcy1hcmNAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8v bGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXNucHMtYXJjCg==