Hi Zdenek, > dm_free() accepts NULL (just like 'free()' - for details see: man 3 free. I see. Thank you very much and sorry for the noise. Best, Liuhua. > Regards > > Zdenek > > > -- > lvm-devel mailing list > lvm-devel at redhat.com > https://www.redhat.com/mailman/listinfo/lvm-devel >