f2fs: Add a small clarification to CONFIG_FS_F2FS_FS_SECURITY

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index d065854..e16a91d 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1892,6 +1892,28 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
 
 EXPORT_SYMBOL(d_instantiate_unique);
 
+/*
+ * This should be equivalent to d_instantiate() + unlock_new_inode(),
+ * with lockdep-related part of unlock_new_inode() done before
+ * anything else.  Use that instead of open-coding d_instantiate()/
+ * unlock_new_inode() combinations.
+ */
+void d_instantiate_new(struct dentry *entry, struct inode *inode)
+{
+       BUG_ON(!hlist_unhashed(&entry->d_u.d_alias));
+       BUG_ON(!inode);
+       lockdep_annotate_inode_mutex_key(inode);
+       spin_lock(&inode->i_lock);
+       __d_instantiate(entry, inode);
+       WARN_ON(!(inode->i_state & I_NEW));
+       inode->i_state &= ~I_NEW;
+       smp_mb();
+       wake_up_bit(&inode->i_state, __I_NEW);
+       spin_unlock(&inode->i_lock);
+       security_d_instantiate(entry, inode);
+}
+EXPORT_SYMBOL(d_instantiate_new);
+
 /**
  * d_instantiate_no_diralias - instantiate a non-aliased dentry
  * @entry: dentry to complete