From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760351AbXFMTaK (ORCPT ); Wed, 13 Jun 2007 15:30:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756647AbXFMT1k (ORCPT ); Wed, 13 Jun 2007 15:27:40 -0400 Received: from nz-out-0506.google.com ([64.233.162.226]:18033 "EHLO nz-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753828AbXFMT1f (ORCPT ); Wed, 13 Jun 2007 15:27:35 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:cc:subject:in-reply-to:x-mailer:date:message-id:mime-version:content-type:reply-to:to:content-transfer-encoding:from; b=gGPZdRz/ui5EmWOPvo+V/XKeLUHDhv7S7twozyNXzoSNdFgdf+LBR6uWJjdSccdXLiZGXZt71Q8tTWrc7ufR/HFCjlmPilOY9w+K+eAhnJUWwd7nL+EjLOtyZqmKTMIUsKZvCvshQsjjv7IDdjQglzxpbyvDyJKlp30kT9INONg= Cc: Tejun Heo Subject: [PATCH 09/11] sysfs: move sysfs_drop_dentry() to dir.c and make it static In-Reply-To: <1181762840495-git-send-email-htejun@gmail.com> X-Mailer: git-send-email Date: Thu, 14 Jun 2007 04:27:24 +0900 Message-Id: <11817628444043-git-send-email-htejun@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Reply-To: Tejun Heo To: greg@kroah.com, dmitry.torokhov@gmail.com, cornelia.huck@de.ibm.com, oneukum@suse.de, rpurdie@rpsys.net, stern@rowland.harvard.edu, maneesh@in.ibm.com, linux-kernel@vger.kernel.org, htejun@gmail.com Content-Transfer-Encoding: 7BIT From: Tejun Heo Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org After add/remove path restructuring, the only user of sysfs_drop_dentry() is sysfs_addrm_finish(). Move sysfs_drop_dentry() to dir.c and make it static. Signed-off-by: Tejun Heo --- fs/sysfs/dir.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/sysfs/inode.c | 56 ------------------------------------------------------ fs/sysfs/sysfs.h | 1 - 3 files changed, 56 insertions(+), 57 deletions(-) diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index dce74ef..c141391 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -435,6 +435,62 @@ void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) } /** + * sysfs_drop_dentry - drop dentry for the specified sysfs_dirent + * @sd: target sysfs_dirent + * + * Drop dentry for @sd. @sd must have been unlinked from its + * parent on entry to this function such that it can't be looked + * up anymore. + * + * @sd->s_dentry which is protected with sysfs_assoc_lock points + * to the currently associated dentry but we're not holding a + * reference to it and racing with dput(). Grab dcache_lock and + * verify dentry before dropping it. If @sd->s_dentry is NULL or + * dput() beats us, no need to bother. + */ +static void sysfs_drop_dentry(struct sysfs_dirent *sd) +{ + struct dentry *dentry = NULL; + struct inode *inode; + + /* We're not holding a reference to ->s_dentry dentry but the + * field will stay valid as long as sysfs_assoc_lock is held. + */ + spin_lock(&sysfs_assoc_lock); + spin_lock(&dcache_lock); + + /* drop dentry if it's there and dput() didn't kill it yet */ + if (sd->s_dentry && sd->s_dentry->d_inode) { + dentry = dget_locked(sd->s_dentry); + spin_lock(&dentry->d_lock); + __d_drop(dentry); + spin_unlock(&dentry->d_lock); + } + + spin_unlock(&dcache_lock); + spin_unlock(&sysfs_assoc_lock); + + dput(dentry); + /* XXX: unpin if directory, this will go away soon */ + if (sysfs_type(sd) == SYSFS_DIR) + dput(dentry); + + /* adjust nlink and update timestamp */ + inode = ilookup(sysfs_sb, sd->s_ino); + if (inode) { + mutex_lock(&inode->i_mutex); + + inode->i_ctime = CURRENT_TIME; + drop_nlink(inode); + if (sysfs_type(sd) == SYSFS_DIR) + drop_nlink(inode); + + mutex_unlock(&inode->i_mutex); + iput(inode); + } +} + +/** * sysfs_addrm_finish - finish up sysfs_dirent add/remove * @acxt: addrm context to finish up * diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index f959668..3756e15 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -197,62 +197,6 @@ void sysfs_instantiate(struct dentry *dentry, struct inode *inode) d_instantiate(dentry, inode); } -/** - * sysfs_drop_dentry - drop dentry for the specified sysfs_dirent - * @sd: target sysfs_dirent - * - * Drop dentry for @sd. @sd must have been unlinked from its - * parent on entry to this function such that it can't be looked - * up anymore. - * - * @sd->s_dentry which is protected with sysfs_assoc_lock points - * to the currently associated dentry but we're not holding a - * reference to it and racing with dput(). Grab dcache_lock and - * verify dentry before dropping it. If @sd->s_dentry is NULL or - * dput() beats us, no need to bother. - */ -void sysfs_drop_dentry(struct sysfs_dirent *sd) -{ - struct dentry *dentry = NULL; - struct inode *inode; - - /* We're not holding a reference to ->s_dentry dentry but the - * field will stay valid as long as sysfs_assoc_lock is held. - */ - spin_lock(&sysfs_assoc_lock); - spin_lock(&dcache_lock); - - /* drop dentry if it's there and dput() didn't kill it yet */ - if (sd->s_dentry && sd->s_dentry->d_inode) { - dentry = dget_locked(sd->s_dentry); - spin_lock(&dentry->d_lock); - __d_drop(dentry); - spin_unlock(&dentry->d_lock); - } - - spin_unlock(&dcache_lock); - spin_unlock(&sysfs_assoc_lock); - - dput(dentry); - /* XXX: unpin if directory, this will go away soon */ - if (sysfs_type(sd) == SYSFS_DIR) - dput(dentry); - - /* adjust nlink and update timestamp */ - inode = ilookup(sysfs_sb, sd->s_ino); - if (inode) { - mutex_lock(&inode->i_mutex); - - inode->i_ctime = CURRENT_TIME; - drop_nlink(inode); - if (sysfs_type(sd) == SYSFS_DIR) - drop_nlink(inode); - - mutex_unlock(&inode->i_mutex); - iput(inode); - } -} - int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name) { struct sysfs_addrm_cxt acxt; diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index 3e9a5ee..92fe1e5 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -90,7 +90,6 @@ extern int sysfs_create_subdir(struct kobject *kobj, const char *name, struct sysfs_dirent **p_sd); extern void sysfs_remove_subdir(struct sysfs_dirent *sd); -extern void sysfs_drop_dentry(struct sysfs_dirent *sd); extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); extern spinlock_t sysfs_assoc_lock; -- 1.5.0.3