generic/694: sync before sampling i_blocks

Without a sync there might still be temporary blocks in i_blocks like
indirect block reservations or additional blocks reserved for out of
place writes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>
1 file changed