Symbol: BLK_TA_BACKMERGE
kernel/trace/blktrace.c
1057
blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_BACKMERGE,
kernel/trace/blktrace.c
1128
blk_add_trace_bio(bio->bi_bdev->bd_disk->queue, bio, BLK_TA_BACKMERGE,