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-rw-r--r--fs/inode.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/inode.c b/fs/inode.c
index bf6adf1..f97de0a 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -567,6 +567,18 @@ EXPORT_SYMBOL(new_inode);
void unlock_new_inode(struct inode *inode)
{
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct file_system_type *type = inode->i_sb->s_type;
+ /*
+ * ensure nobody is actually holding i_mutex
+ */
+ mutex_destroy(&inode->i_mutex);
+ mutex_init(&inode->i_mutex);
+ if (inode->i_mode & S_IFDIR)
+ lockdep_set_class(&inode->i_mutex, &type->i_mutex_dir_key);
+ else
+ lockdep_set_class(&inode->i_mutex, &type->i_mutex_key);
+#endif
/*
* This is special! We do not need the spinlock
* when clearing I_LOCK, because we're guaranteed
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