MASK_TC_BIT       136 block/blktrace.c 	what |= MASK_TC_BIT(rw, BARRIER);
MASK_TC_BIT       137 block/blktrace.c 	what |= MASK_TC_BIT(rw, SYNC);
MASK_TC_BIT       138 block/blktrace.c 	what |= MASK_TC_BIT(rw, AHEAD);
MASK_TC_BIT       139 block/blktrace.c 	what |= MASK_TC_BIT(rw, META);
MASK_TC_BIT       140 block/blktrace.c 	what |= MASK_TC_BIT(rw, DISCARD);