From patchwork Fri Feb 11 10:24:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1591558 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4Jw8s93Mjnz9sFq for ; Fri, 11 Feb 2022 21:25:49 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Jw8s84Z50z3cXG for ; Fri, 11 Feb 2022 21:25:48 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=csgroup.eu (client-ip=93.17.235.10; helo=pegase2.c-s.fr; envelope-from=christophe.leroy@csgroup.eu; receiver=) Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Jw8rS2TKcz3cC9 for ; Fri, 11 Feb 2022 21:25:12 +1100 (AEDT) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4Jw8rK15wZz9sSL; Fri, 11 Feb 2022 11:25:05 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RVC_5M6K9gs6; Fri, 11 Feb 2022 11:25:05 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4Jw8rJ088Lz9sSM; Fri, 11 Feb 2022 11:25:04 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id E74F28B77E; Fri, 11 Feb 2022 11:25:03 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id avygUaqL76b8; Fri, 11 Feb 2022 11:25:03 +0100 (CET) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.6.91]) by messagerie.si.c-s.fr (Postfix) with ESMTP id A38D28B764; Fri, 11 Feb 2022 11:25:03 +0100 (CET) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 21BAOsOZ946508 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 11 Feb 2022 11:24:54 +0100 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 21BAOq8A946507; Fri, 11 Feb 2022 11:24:52 +0100 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , "David S. Miller" , Jakub Kicinski Subject: [PATCH 1/2] net: Allow csum_sub() to be provided in arch Date: Fri, 11 Feb 2022 11:24:48 +0100 Message-Id: <0c8eaab8f0685d2a70d125cf876238c70afd4fb6.1644574987.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1644575088; l=989; s=20211009; h=from:subject:message-id; bh=RUCXz7rcwV3vtRjuwGPzOWG1MqwEYlRVJE5g+0Z10T0=; b=eADc4aCLdklo7HvFbLsm7mGATs8mPnBrP4sXzi8ylYEqFq0APBPHpYUY+C3ha30J+ZcvLukGCpHz n6af84NTDAWj2ByZb/YbwA6p1bUFrsK2r9w+YrLcIqegfq86tYCK X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" In the same spirit as commit 07064c6e022b ("net: Allow csum_add to be provided in arch"), allow csum_sub() to be provided by arch. The generic implementation of csum_sub() call csum_add() with the complement of the addendum. Some architectures can do it directly. This will also avoid getting several copies of csum_sub() outlined when building with -Os. Signed-off-by: Christophe Leroy --- include/net/checksum.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/net/checksum.h b/include/net/checksum.h index 9badcd5532ef..735d98724145 100644 --- a/include/net/checksum.h +++ b/include/net/checksum.h @@ -62,10 +62,12 @@ static inline __wsum csum_add(__wsum csum, __wsum addend) } #endif +#ifndef HAVE_ARCH_CSUM_SUB static inline __wsum csum_sub(__wsum csum, __wsum addend) { return csum_add(csum, ~addend); } +#endif static inline __sum16 csum16_add(__sum16 csum, __be16 addend) {