ceph: ensure d_name stability in ceph_dentry_hash()
Take the d_lock here to ensure that d_name doesn't change. Cc: stable@vger.kernel.org Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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