From patchwork Tue Mar 9 15:53:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12125891 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 41E10C433E0 for ; Tue, 9 Mar 2021 15:56:34 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id CF6F765242 for ; Tue, 9 Mar 2021 15:56:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CF6F765242 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 669E38D010A; Tue, 9 Mar 2021 10:56:33 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 640688D007F; Tue, 9 Mar 2021 10:56:33 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 507F98D010A; Tue, 9 Mar 2021 10:56:33 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0153.hostedemail.com [216.40.44.153]) by kanga.kvack.org (Postfix) with ESMTP id 3564F8D007F for ; Tue, 9 Mar 2021 10:56:33 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id EC82C1730865 for ; Tue, 9 Mar 2021 15:56:32 +0000 (UTC) X-FDA: 77900788224.15.DF16EAA Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf02.hostedemail.com (Postfix) with ESMTP id AFC2640F8C21 for ; Tue, 9 Mar 2021 15:56:14 +0000 (UTC) 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=YCa5USJ2jm70Z2UsFo8WsaOurKZNnFvLpmzM+RUjH7Q=; b=tOG8dHR47ixjkPXc3KpuPHwBJN 9VFDsIBs0iNabrNwVXnkHpEUdRE0Xw1VihxeUy1+Fk4KYBtVgcEksHwzR18mV15ZWijtKj5WiAj/5 7KOcX17CSbvl+aU8mkaAl7PIwJV8dwwIDpxTeRudfOZASKqLd2oSxE8ndV2Mhje3p8opZFyB+5AY6 3WCbnTsjVJ3yqS6hJgSLnrgXWlagzm2/jm1eIMY/fHzgbKF2asFhyKisFuX10Qwx8gBqZ5of7CTH3 ZHAvbig1z/NdDSn0Hj3VaXLltwy6s7eRmlDs/uoLyCyDcM4moI+4Km8Zi3CtzTIP32H3qV1JoiGlq YC8O2rHA==; Received: from [2001:4bb8:180:9884:c70:4a89:bc61:3] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lJehF-000lP8-0R; Tue, 09 Mar 2021 15:55:01 +0000 From: Christoph Hellwig To: Al Viro Cc: Andrew Morton , Daniel Vetter , Nadav Amit , "VMware, Inc." , "Michael S. Tsirkin" , David Hildenbrand , Minchan Kim , Nitin Gupta , Jason Gunthorpe , Alex Williamson , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 6/9] virtio_balloon: remove the balloon-kvm file system Date: Tue, 9 Mar 2021 16:53:45 +0100 Message-Id: <20210309155348.974875-7-hch@lst.de> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210309155348.974875-1-hch@lst.de> References: <20210309155348.974875-1-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-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: AFC2640F8C21 X-Stat-Signature: u1rxgreiw7nnhfpjktzsctiy4zdmy988 Received-SPF: none (casper.srs.infradead.org>: No applicable sender policy available) receiver=imf02; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615305374-680679 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Just use the generic anon_inode file system. Signed-off-by: Christoph Hellwig --- drivers/virtio/virtio_balloon.c | 30 +++--------------------------- 1 file changed, 3 insertions(+), 27 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index cae76ee5bdd688..1efb890cd3ff09 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -6,6 +6,7 @@ * Copyright 2008 Rusty Russell IBM Corporation */ +#include #include #include #include @@ -42,10 +43,6 @@ (1 << (VIRTIO_BALLOON_HINT_BLOCK_ORDER + PAGE_SHIFT)) #define VIRTIO_BALLOON_HINT_BLOCK_PAGES (1 << VIRTIO_BALLOON_HINT_BLOCK_ORDER) -#ifdef CONFIG_BALLOON_COMPACTION -static struct vfsmount *balloon_mnt; -#endif - enum virtio_balloon_vq { VIRTIO_BALLOON_VQ_INFLATE, VIRTIO_BALLOON_VQ_DEFLATE, @@ -805,18 +802,6 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, return MIGRATEPAGE_SUCCESS; } - -static int balloon_init_fs_context(struct fs_context *fc) -{ - return init_pseudo(fc, BALLOON_KVM_MAGIC) ? 0 : -ENOMEM; -} - -static struct file_system_type balloon_fs = { - .name = "balloon-kvm", - .init_fs_context = balloon_init_fs_context, - .kill_sb = kill_anon_super, -}; - #endif /* CONFIG_BALLOON_COMPACTION */ static unsigned long shrink_free_pages(struct virtio_balloon *vb, @@ -909,17 +894,11 @@ static int virtballoon_probe(struct virtio_device *vdev) goto out_free_vb; #ifdef CONFIG_BALLOON_COMPACTION - balloon_mnt = kern_mount(&balloon_fs); - if (IS_ERR(balloon_mnt)) { - err = PTR_ERR(balloon_mnt); - goto out_del_vqs; - } - vb->vb_dev_info.migratepage = virtballoon_migratepage; - vb->vb_dev_info.inode = alloc_anon_inode_sb(balloon_mnt->mnt_sb); + vb->vb_dev_info.inode = alloc_anon_inode(); if (IS_ERR(vb->vb_dev_info.inode)) { err = PTR_ERR(vb->vb_dev_info.inode); - goto out_kern_unmount; + goto out_del_vqs; } vb->vb_dev_info.inode->i_mapping->a_ops = &balloon_aops; #endif @@ -1016,8 +995,6 @@ static int virtballoon_probe(struct virtio_device *vdev) out_iput: #ifdef CONFIG_BALLOON_COMPACTION iput(vb->vb_dev_info.inode); -out_kern_unmount: - kern_unmount(balloon_mnt); out_del_vqs: #endif vdev->config->del_vqs(vdev); @@ -1070,7 +1047,6 @@ static void virtballoon_remove(struct virtio_device *vdev) if (vb->vb_dev_info.inode) iput(vb->vb_dev_info.inode); - kern_unmount(balloon_mnt); #endif kfree(vb); }