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cgroups: Fix a lockdep warning at cgroup removal

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Commit 2fd6b7f5 ("fs: dcache scale subdirs") forgot to annotate a dentry
lock, which caused a lockdep warning.

Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
This commit is contained in:
Li Zefan 2011-01-14 11:34:34 +08:00 committed by Nick Piggin
parent 7b9337aaf9
commit 3ec762ad8b
1 changed files with 1 additions and 1 deletions
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2
kernel/cgroup.c
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@ -912,7 +912,7 @@ static void cgroup_d_remove_dir(struct dentry *dentry)
parent = dentry->d_parent;
spin_lock(&parent->d_lock);
spin_lock(&dentry->d_lock);
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
list_del_init(&dentry->d_u.d_child);
spin_unlock(&dentry->d_lock);
spin_unlock(&parent->d_lock);