From patchwork Tue Jun 8 16:05:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12307405 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 3BF20C4743F for ; Tue, 8 Jun 2021 16:06:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 26B0261352 for ; Tue, 8 Jun 2021 16:06:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233238AbhFHQIf (ORCPT ); Tue, 8 Jun 2021 12:08:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232686AbhFHQI2 (ORCPT ); Tue, 8 Jun 2021 12:08:28 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A589EC061574; Tue, 8 Jun 2021 09:06:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=XwFsKV0wTnqrjM2zeN8AG8XOGt14/N7ay2THQ9JeNTU=; b=gAN/Fa8WhYn6iNnCWrgN61xP/7 qpzWIbLp0RYRHKw+NrnaYNk86XGlBkEyNRZLSg+GjvrOS8dmNbfGeS9TaVA0rvGZTGvYqu20webuB fT//Gqjhw5BrXJ6eG7EsymCK6M9V8oVkAIum+X29mXJKhsWauuNFnG1S8uKWQPoxx07AsAXKnHiDM eezVe5V2bDEhRbNtHqKM1THzpw5ZQMP5ng6DjhKyhuQSgWmrH8JXt8cz85Ba93BG0y+rgch2mzvYp uTW6yTIWA84hxpbqarGW1LvLqWd9BltX1o8xjsjJ6gNYQIu6J7HYcOTEWcCAf/Ps19PgmjiQKbx4M KvtAPxqw==; Received: from [2001:4bb8:192:ff5f:74ed:7c4f:a5ee:8dcb] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1lqeFE-009Rci-3P; Tue, 08 Jun 2021 16:06:24 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Thomas Bogendoerfer , Geoff Levand , Ilya Dryomov , Dongsheng Yang , Mike Snitzer , Ira Weiny , dm-devel@redhat.com, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org Subject: [PATCH 05/16] bvec: add memcpy_{from,to}_bvec and memzero_bvec helper Date: Tue, 8 Jun 2021 18:05:52 +0200 Message-Id: <20210608160603.1535935-6-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210608160603.1535935-1-hch@lst.de> References: <20210608160603.1535935-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Add helpers to perform common memory operation on a bvec. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni --- include/linux/bvec.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index d64d6c0ceb77..ac835fa01ee3 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -189,4 +189,19 @@ static inline void *bvec_kmap_local(struct bio_vec *bvec) return kmap_local_page(bvec->bv_page) + bvec->bv_offset; } +static inline void memcpy_from_bvec(char *to, struct bio_vec *bvec) +{ + memcpy_from_page(to, bvec->bv_page, bvec->bv_offset, bvec->bv_len); +} + +static inline void memcpy_to_bvec(struct bio_vec *bvec, const char *from) +{ + memcpy_to_page(bvec->bv_page, bvec->bv_offset, from, bvec->bv_len); +} + +static inline void memzero_bvec(struct bio_vec *bvec) +{ + memzero_page(bvec->bv_page, bvec->bv_offset, bvec->bv_len); +} + #endif /* __LINUX_BVEC_H */