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[ Upstream commitab1ddef98a] Ceph has a need to know whether a particular inode has any locks set on it. It's currently tracking that by a num_locks field in its filp->private_data, but that's problematic as it tries to decrement this field when releasing locks and that can race with the file being torn down. Add a new vfs_inode_has_locks helper that just returns whether any locks are currently held on the inode. Reviewed-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jeff Layton <jlayton@kernel.org> Stable-dep-of:461ab10ef7("ceph: switch to vfs_inode_has_locks() to fix file lock bug") Signed-off-by: Sasha Levin <sashal@kernel.org>