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authorHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>2006-09-20 07:38:00 (GMT)
committerGreg Kroah-Hartman <gregkh@suse.de>2006-10-18 19:49:54 (GMT)
commite42344514c6e8ca7f5427da9b1407b56550dfa01 (patch)
tree4dd26210cc0bb5147a455ef9b097266d0218c3b9
parent722385f75efd82d9f480f0765a1e97a4d83cac0d (diff)
downloadlinux-e42344514c6e8ca7f5427da9b1407b56550dfa01.tar.xz
sysfs: remove duplicated dput in sysfs_update_file
Following function can drops d_count twice against one reference by lookup_one_len. <SOURCE> /** * sysfs_update_file - update the modified timestamp on an object attribute. * @kobj: object we're acting for. * @attr: attribute descriptor. */ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr) { struct dentry * dir = kobj->dentry; struct dentry * victim; int res = -ENOENT; mutex_lock(&dir->d_inode->i_mutex); victim = lookup_one_len(attr->name, dir, strlen(attr->name)); if (!IS_ERR(victim)) { /* make sure dentry is really there */ if (victim->d_inode && (victim->d_parent->d_inode == dir->d_inode)) { victim->d_inode->i_mtime = CURRENT_TIME; fsnotify_modify(victim); /** * Drop reference from initial sysfs_get_dentry(). */ dput(victim); res = 0; } else d_drop(victim); /** * Drop the reference acquired from sysfs_get_dentry() above. */ dput(victim); } mutex_unlock(&dir->d_inode->i_mutex); return res; } </SOURCE> PCI-hotplug (drivers/pci/hotplug/pci_hotplug_core.c) is only user of this function. I confirmed that dentry of /sys/bus/pci/slots/XXX/* have negative d_count value. This patch removes unnecessary dput(). Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Acked-by: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--fs/sysfs/file.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 146f1de..93218cc 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -483,11 +483,6 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
(victim->d_parent->d_inode == dir->d_inode)) {
victim->d_inode->i_mtime = CURRENT_TIME;
fsnotify_modify(victim);
-
- /**
- * Drop reference from initial sysfs_get_dentry().
- */
- dput(victim);
res = 0;
} else
d_drop(victim);