Symbol: blk_add_trace_bio_backmerge
kernel/trace/blktrace.c
1343
ret = register_trace_block_bio_backmerge(blk_add_trace_bio_backmerge, NULL);
kernel/trace/blktrace.c
1386
unregister_trace_block_bio_backmerge(blk_add_trace_bio_backmerge, NULL);