From htejun@gmail.com Mon Aug 20 05:36:51 2007 From: Eric W. Biederman Date: Mon, 20 Aug 2007 21:36:30 +0900 Subject: [PATCH 05/14] sysfs: Make sysfs_mount static To: ebiederm@xmission.com, cornelia.huck@de.ibm.com, greg@kroah.com, linux-kernel@vger.kernel.org, satyam@infradead.org, stern@rowland.harvard.edu, containers@lists.osdl.org, htejun@gmail.com Cc: Eric W. Biederman , Tejun Heo Message-ID: <1187613390857-git-send-email-htejun@gmail.com> From: Eric W. Biederman This patch modifies the users of sysfs_mount to use sysfs_root instead (which is what they are looking for). It then makes sysfs_mount static to keep people from using it by accident. The net result is slightly faster and cleaner code. Signed-off-by: Eric W. Biederman Signed-off-by: Tejun Heo Cc: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/dir.c | 4 +--- fs/sysfs/mount.c | 2 +- fs/sysfs/symlink.c | 7 +++---- fs/sysfs/sysfs.h | 1 - 4 files changed, 5 insertions(+), 9 deletions(-) --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -737,10 +737,8 @@ int sysfs_create_dir(struct kobject * ko if (kobj->parent) parent_sd = kobj->parent->sd; - else if (sysfs_mount && sysfs_mount->mnt_sb) - parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata; else - return -EFAULT; + parent_sd = &sysfs_root; error = create_dir(kobj, parent_sd, kobject_name(kobj), &sd); if (!error) --- a/fs/sysfs/mount.c +++ b/fs/sysfs/mount.c @@ -14,7 +14,7 @@ /* Random magic number */ #define SYSFS_MAGIC 0x62656572 -struct vfsmount *sysfs_mount; +static struct vfsmount *sysfs_mount; struct super_block * sysfs_sb = NULL; struct kmem_cache *sysfs_dir_cachep; --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -60,10 +60,9 @@ int sysfs_create_link(struct kobject * k BUG_ON(!name); - if (!kobj) { - if (sysfs_mount && sysfs_mount->mnt_sb) - parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata; - } else + if (!kobj) + parent_sd = &sysfs_root; + else parent_sd = kobj->sd; error = -EFAULT; --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -51,7 +51,6 @@ struct sysfs_addrm_cxt { int cnt; }; -extern struct vfsmount * sysfs_mount; extern struct sysfs_dirent sysfs_root; extern struct kmem_cache *sysfs_dir_cachep;