Re: [Xen-devel] [PATCH 3/3] xen/blk[front|back]: Enhance discardsupport with secure erasing support.

[Konrad Rzeszutek Wilk]

> > I think an explicit flag variable is likely to be less trouble WRT
> > maintaining compatibility in the future than a bit-field. Also I think
> > you may as well align the struct size to something larger than a byte,
> > either 4 or 8 bytes would make sense.
> 
> Ok. Will change it and make it an uint64_t secure_flag
> variable. Later on if there are any "other" flags we can chop it down.

New patch (it also looks like the patch I sent to xen-devel to update
the blkif.h was never merged) - so let me send right now.

BTW, it seems that the #pragma pack(push, 4) is used in the
drivers/block/xen-blkback/common.h to compact the structures already so
I don't think we need the aligment.