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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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=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 34E8BC4338F for ; Wed, 4 Aug 2021 09:58:16 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id DEBEC61004 for ; Wed, 4 Aug 2021 09:58:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org DEBEC61004 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=32svFaa6BcWZDR6GBoOhzm5+8uNoxafAhHXr9k599eY=; b=t5sak2LqAWbjb4 Jyn2G+ad9EhOxEJyWCvsG2O9OJUn3isOxylOt1dnxQ7SwEHNLoBFrvbBaWaTDMlSUpXFG2L41aUpO rMtjZXTqi96KiT/062iav/SqkfzvVoaclfqhW3kVvnDkmwDU7O59phMQgXTFad6tkshTQ8VivihPv eZHkAXwRqeuodSEi3Wx74WKCqa3cK2TPReYWDYazrTesyA1/ZaDS2LX5sfI0FLXxVBANL7CBkg754 3P27WsJpWsrd4VYlJwqg2lxNL45GVkTIHVcqJ1Xx4y0bDP/BzXAQ3zc2zLfj/uyE27TKGC93KNmBp EBqBSfIwBJmRvhyDoaIQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBDew-005YC4-2h; Wed, 04 Aug 2021 09:57:58 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBDeu-005YB0-DD; Wed, 04 Aug 2021 09:57:56 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=UJrCb7CGT+ZAjfUzBrDvox/kj9NEI6DcJ2NjSWkF2zM=; b=sYPxayznDPwIRyL7nKUygoZD3k dt/bjMT5bAbfRZ13gnpvjc5NY9EksxP5d32LJBcepAgioku0FtN2VHK7R7M7Afs6OF/FfY8D4q2NS Ys9QfpkLm0yZEn2Yq8/JAyeP6uZhYAYHcOZgrcndDEeHPgfKy9aR+1m/S5KIqNBPJusPfmCvukDGK HDIiS0Sp1Dg5y6Sguy/uqGCvuCY2RruHbmHkNPU54WL6WooDs1ZFZ0+/VZCp4ENDmurNe1u3w4CYN wJPMT1dd8CyN11OgdFiYEiEIAngynUkdd6r9ITrs/sxLPRokEREfq2f3JisClKZP8l+gfo3TC+ru9 p2MBCyUQ==; Received: from [2a02:1205:5023:1f80:c068:bd3d:78b3:7d37] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBDeG-005eu2-Q4; Wed, 04 Aug 2021 09:57:31 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Richard Weinberger , Anton Ivanov , Geoff Levand , Ilya Dryomov , Paolo Bonzini , Stefan Hajnoczi , Song Liu , Mike Snitzer , Coly Li , Stefan Haberland , Jan Hoeppner , "Martin K. Petersen" , Phillip Lougher , linux-block@vger.kernel.org, dm-devel@redhat.com, linux-um@lists.infradead.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org Subject: [PATCH 01/15] bvec: add a bvec_virt helper Date: Wed, 4 Aug 2021 11:56:20 +0200 Message-Id: <20210804095634.460779-2-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210804095634.460779-1-hch@lst.de> References: <20210804095634.460779-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Add a helper to get the virtual address for a bvec. This avoids that all callers need to know about the page + offset representation. Signed-off-by: Christoph Hellwig --- include/linux/bvec.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index f9fa43b940ff..0e9bdd42dafb 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -229,4 +229,16 @@ static inline void memzero_bvec(struct bio_vec *bvec) memzero_page(bvec->bv_page, bvec->bv_offset, bvec->bv_len); } +/** + * bvec_virt - return the virtual address for a bvec + * @bvec: bvec to return the virtual address for + * + * Note: the caller must ensure that @bvec->bv_page is not a highmem page. + */ +static inline void *bvec_virt(struct bio_vec *bvec) +{ + WARN_ON_ONCE(PageHighMem(bvec->bv_page)); + return page_address(bvec->bv_page) + bvec->bv_offset; +} + #endif /* __LINUX_BVEC_H */ -- 2.30.2 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme