[dm-devel] [PATCH v2] dm: Fix alignment stacking on partitioned devices

[Martin K. Petersen]

>>>>> "Mike" == Mike Snitzer <snitzer at redhat.com> writes:

Mike,

Mike> After looking closer there seems to be various type
Mike> inconsistencies in the alignment_offset and discard_alignment
Mike> related routines (returning 'int' in places, etc).

Mike> The following patch is what I found; I have no problem with
Mike> switching from 'unsigned long' to blk_off_t for LBD though.

I only use blk_off_t in the places where we're dealing with absolute
offsets.

Blindly converting alignment_offset from int to unsigned long won't
work.  We depend on being able to return -1 in case of
misalignment. Hence int and not unsigned int. Furthermore, the returned
values are always modulo the granularity so int is plenty big.

So NAK from here.

-- 
Martin K. Petersen	Oracle Linux Engineering