[Pull request] bcache data offset

Hello, These patches update the bcache superblock format so that backing device data can be at an arbitrary offset from the start of the backing device; this helps convert partitions or logical volumes to bcache in-place, and has been updated to use the new forma

[Pull request] bcache data offset

Hello, These patches update the bcache superblock format so that backing device data can be at an arbitrary offset from the start of the backing device; this helps convert partitions or logical volumes to bcache in-place, and has been updated to use the new forma