vfs: drop lock/unlock super

Removed s_lock from super_block and removed lock/unlock super.

Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/super.c b/fs/super.c
index a3bc935..12f1237 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -186,15 +186,8 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
                spin_lock_init(&s->s_inode_lru_lock);
                INIT_LIST_HEAD(&s->s_mounts);
                init_rwsem(&s->s_umount);
-               mutex_init(&s->s_lock);
                lockdep_set_class(&s->s_umount, &type->s_umount_key);
                /*
-                * The locking rules for s_lock are up to the
-                * filesystem. For example ext3fs has different
-                * lock ordering than usbfs:
-                */
-               lockdep_set_class(&s->s_lock, &type->s_lock_key);
-               /*
                 * sget() can have s_umount recursion.
                 *
                 * When it cannot find a suitable sb, it allocates a new
@@ -394,22 +387,6 @@ bool grab_super_passive(struct super_block *sb)
        return false;
 }
 
-/*
- * Superblock locking.  We really ought to get rid of these two.
- */
-void lock_super(struct super_block * sb)
-{
-       mutex_lock(&sb->s_lock);
-}
-
-void unlock_super(struct super_block * sb)
-{
-       mutex_unlock(&sb->s_lock);
-}
-
-EXPORT_SYMBOL(lock_super);
-EXPORT_SYMBOL(unlock_super);
-
 /**
  *     generic_shutdown_super  -       common helper for ->kill_sb()
  *     @sb: superblock to kill

diff --git a/include/linux/fs.h b/include/linux/fs.h
index c617ed0..b7e7060 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1507,7 +1507,6 @@ struct super_block {
        unsigned long           s_magic;
        struct dentry           *s_root;
        struct rw_semaphore     s_umount;
-       struct mutex            s_lock;
        int                     s_count;
        atomic_t                s_active;
 #ifdef CONFIG_SECURITY