[PATCH 4.9 37/51] ceph: clean up unsafe d_parent accesses in build_dentry_path

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Jeff Layton [ Upstream commit c6b0b656ca24ede6657abb4a2cd910fa9c1879ba ] While we hold a reference to the dentry when build_dentry_path is called, we could end up racing

[PATCH 4.9 37/51] ceph: clean up unsafe d_parent accesses in build_dentry_path

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Jeff Layton [ Upstream commit c6b0b656ca24ede6657abb4a2cd910fa9c1879ba ] While we hold a reference to the dentry when build_dentry_path is called, we could end up racing with a rename that