BKEY_MID_BITS     239 drivers/md/bcache/bset.c #define BKEY_MANTISSA_BITS	(32 - BKEY_MID_BITS - BKEY_EXPONENT_BITS)
BKEY_MID_BITS     244 drivers/md/bcache/bset.c 	unsigned int	m:BKEY_MID_BITS;