KEY_FIELD          46 include/uapi/linux/bcache.h KEY_FIELD(HEADER_SIZE,	high, 58, 2)
KEY_FIELD          47 include/uapi/linux/bcache.h KEY_FIELD(KEY_CSUM,	high, 56, 2)
KEY_FIELD          48 include/uapi/linux/bcache.h KEY_FIELD(KEY_PINNED,	high, 55, 1)
KEY_FIELD          49 include/uapi/linux/bcache.h KEY_FIELD(KEY_DIRTY,	high, 36, 1)
KEY_FIELD          51 include/uapi/linux/bcache.h KEY_FIELD(KEY_SIZE,	high, 20, KEY_SIZE_BITS)
KEY_FIELD          52 include/uapi/linux/bcache.h KEY_FIELD(KEY_INODE,	high, 0,  20)