The value of flags is one of DATA/METADATA/SYSTEM, they must exist at
when add_pinned_bytes is called.
Signed-off-by: NOmar Sandoval <osandov@fb.com>
Tested-by: NHolger Hoffstätte <holger@applied-asynchrony.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
[ added changelog ]
Signed-off-by: NDavid Sterba <dsterba@suse.com>