From patchwork Wed Jan 14 09:42:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 428890 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4757D14012C for ; Wed, 14 Jan 2015 20:45:12 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YBKUL-00025z-CB; Wed, 14 Jan 2015 09:43:45 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YBKUI-00025O-VE for linux-mtd@bombadil.infradead.org; Wed, 14 Jan 2015 09:43:43 +0000 Received: from 213162068068.public.t-mobile.at ([213.162.68.68] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1YBKUG-0007fN-Iu; Wed, 14 Jan 2015 09:43:40 +0000 From: Christoph Hellwig To: Jens Axboe Subject: [PATCH 01/12] fs: deduplicate noop_backing_dev_info Date: Wed, 14 Jan 2015 10:42:30 +0100 Message-Id: <1421228561-16857-2-git-send-email-hch@lst.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1421228561-16857-1-git-send-email-hch@lst.de> References: <1421228561-16857-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Cc: linux-nfs@vger.kernel.org, linux-mm@kvack.org, David Howells , linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, Tejun Heo , ceph-devel@vger.kernel.org X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org hugetlbfs, kernfs and dlmfs can simply use noop_backing_dev_info instead of creating a local duplicate. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Reviewed-by: Jan Kara --- fs/hugetlbfs/inode.c | 14 +------------- fs/kernfs/inode.c | 14 +------------- fs/kernfs/kernfs-internal.h | 1 - fs/kernfs/mount.c | 1 - fs/ocfs2/dlmfs/dlmfs.c | 16 ++-------------- 5 files changed, 4 insertions(+), 42 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 5eba47f..de7c95c 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -62,12 +62,6 @@ static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); } -static struct backing_dev_info hugetlbfs_backing_dev_info = { - .name = "hugetlbfs", - .ra_pages = 0, /* No readahead */ - .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, -}; - int sysctl_hugetlb_shm_group; enum { @@ -498,7 +492,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, lockdep_set_class(&inode->i_mapping->i_mmap_rwsem, &hugetlbfs_i_mmap_rwsem_key); inode->i_mapping->a_ops = &hugetlbfs_aops; - inode->i_mapping->backing_dev_info =&hugetlbfs_backing_dev_info; + inode->i_mapping->backing_dev_info = &noop_backing_dev_info; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; inode->i_mapping->private_data = resv_map; info = HUGETLBFS_I(inode); @@ -1032,10 +1026,6 @@ static int __init init_hugetlbfs_fs(void) return -ENOTSUPP; } - error = bdi_init(&hugetlbfs_backing_dev_info); - if (error) - return error; - error = -ENOMEM; hugetlbfs_inode_cachep = kmem_cache_create("hugetlbfs_inode_cache", sizeof(struct hugetlbfs_inode_info), @@ -1071,7 +1061,6 @@ static int __init init_hugetlbfs_fs(void) out: kmem_cache_destroy(hugetlbfs_inode_cachep); out2: - bdi_destroy(&hugetlbfs_backing_dev_info); return error; } @@ -1091,7 +1080,6 @@ static void __exit exit_hugetlbfs_fs(void) for_each_hstate(h) kern_unmount(hugetlbfs_vfsmount[i++]); unregister_filesystem(&hugetlbfs_fs_type); - bdi_destroy(&hugetlbfs_backing_dev_info); } module_init(init_hugetlbfs_fs) diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index 9852176..06f0688 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -24,12 +24,6 @@ static const struct address_space_operations kernfs_aops = { .write_end = simple_write_end, }; -static struct backing_dev_info kernfs_bdi = { - .name = "kernfs", - .ra_pages = 0, /* No readahead */ - .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, -}; - static const struct inode_operations kernfs_iops = { .permission = kernfs_iop_permission, .setattr = kernfs_iop_setattr, @@ -40,12 +34,6 @@ static const struct inode_operations kernfs_iops = { .listxattr = kernfs_iop_listxattr, }; -void __init kernfs_inode_init(void) -{ - if (bdi_init(&kernfs_bdi)) - panic("failed to init kernfs_bdi"); -} - static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn) { static DEFINE_MUTEX(iattr_mutex); @@ -298,7 +286,7 @@ static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode) kernfs_get(kn); inode->i_private = kn; inode->i_mapping->a_ops = &kernfs_aops; - inode->i_mapping->backing_dev_info = &kernfs_bdi; + inode->i_mapping->backing_dev_info = &noop_backing_dev_info; inode->i_op = &kernfs_iops; set_default_inode_attr(inode, kn->mode); diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h index dc84a3e..af9fa74 100644 --- a/fs/kernfs/kernfs-internal.h +++ b/fs/kernfs/kernfs-internal.h @@ -88,7 +88,6 @@ int kernfs_iop_removexattr(struct dentry *dentry, const char *name); ssize_t kernfs_iop_getxattr(struct dentry *dentry, const char *name, void *buf, size_t size); ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size); -void kernfs_inode_init(void); /* * dir.c diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index f973ae9..8eaf417 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -246,5 +246,4 @@ void __init kernfs_init(void) kernfs_node_cache = kmem_cache_create("kernfs_node_cache", sizeof(struct kernfs_node), 0, SLAB_PANIC, NULL); - kernfs_inode_init(); } diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index 57c40e3..6000d30 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -390,12 +390,6 @@ clear_fields: ip->ip_conn = NULL; } -static struct backing_dev_info dlmfs_backing_dev_info = { - .name = "ocfs2-dlmfs", - .ra_pages = 0, /* No readahead */ - .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, -}; - static struct inode *dlmfs_get_root_inode(struct super_block *sb) { struct inode *inode = new_inode(sb); @@ -404,7 +398,7 @@ static struct inode *dlmfs_get_root_inode(struct super_block *sb) if (inode) { inode->i_ino = get_next_ino(); inode_init_owner(inode, NULL, mode); - inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info; + inode->i_mapping->backing_dev_info = &noop_backing_dev_info; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; inc_nlink(inode); @@ -428,7 +422,7 @@ static struct inode *dlmfs_get_inode(struct inode *parent, inode->i_ino = get_next_ino(); inode_init_owner(inode, parent, mode); - inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info; + inode->i_mapping->backing_dev_info = &noop_backing_dev_info; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; ip = DLMFS_I(inode); @@ -643,10 +637,6 @@ static int __init init_dlmfs_fs(void) int status; int cleanup_inode = 0, cleanup_worker = 0; - status = bdi_init(&dlmfs_backing_dev_info); - if (status) - return status; - dlmfs_inode_cache = kmem_cache_create("dlmfs_inode_cache", sizeof(struct dlmfs_inode_private), 0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| @@ -673,7 +663,6 @@ bail: kmem_cache_destroy(dlmfs_inode_cache); if (cleanup_worker) destroy_workqueue(user_dlm_worker); - bdi_destroy(&dlmfs_backing_dev_info); } else printk("OCFS2 User DLM kernel interface loaded\n"); return status; @@ -693,7 +682,6 @@ static void __exit exit_dlmfs_fs(void) rcu_barrier(); kmem_cache_destroy(dlmfs_inode_cache); - bdi_destroy(&dlmfs_backing_dev_info); } MODULE_AUTHOR("Oracle");