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configfs: mutex_lock_nested() fix 

configfs_unregister_subsystem() nests a pair of inode i_mutex acquisitions,
and thus needs annotation via mutex_lock_nested().

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2006-10-20 14:55:54 -07:00
parent 1fabe1481f
commit 55ed16029d
1 changed files with 3 additions and 2 deletions
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5
fs/configfs/dir.c
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@ -1176,8 +1176,9 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
return;
}
mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
mutex_lock(&dentry->d_inode->i_mutex);
mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex,
I_MUTEX_PARENT);
mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
if (configfs_detach_prep(dentry)) {
printk(KERN_ERR "configfs: Tried to unregister non-empty subsystem!\n");
}