The following patches begin to cleanup the request->cmd_flags and bio->bi_rw mess. We currently use cmd_flags to specify the operation, attributes and state of the request. For bi_rw we use it for similar info and also the priority but then also have another bi_flags field for state. At some point, we abused them so much we just made cmd_flags 64 bits, so we could add more. The following patches seperate the operation (read, write discard, flush, etc) from cmd_flags/bi_rw. This patchset was made against linux-next from today Jan 11 2016. (git tag next-20160111). I put a git tree here: https://github.com/mikechristie/linux-kernel.git v3: 1. Used "=" instead of "|=" to setup bio bi_rw. 2. Removed __get_request cmd_flags compat code. 3. Merged initial dm related changes requested by Mike Snitzer. 4. Fixed ubd kbuild errors in flush related patches. 5. Fix 80 char col issues in several patches. 6. Fix issue with one of the btrfs patches where it looks like I reverted a patch when trying to fix a merge error. v2 1. Dropped arguments from submit_bio, and had callers setup bio. 2. Add REQ_OP_FLUSH for request_fn users and renamed REQ_FLUSH to REQ_PREFLUSH for make_request_fn users. 3. Dropped bio/rq_data_dir functions, and added a op_is_write function instead. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
