There is a risk that the variable will be used without being initialized.

This was largely found by using a static code analysis program called cppche
Signed-off-by: NRickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Acked-by: NSuresh Thiagarajan <Suresh.Thiagarajan@pmcs.com>
Acked-by: NJack Wang <xjtuwjp@gmail.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>