Comment 5 for bug 1740143

> Apparently the original patch didn’t send for linux stable branch.

I don't know exactly what you mean, but 4.14 kernel has this patch. It's easy to verify by changed messages ("enabling ssd optimizations" vs "enabling SSD mode").

> can you ask the patch author and BTRFS maintainers

I'm not sure how to ask BTRFS maintainers and why I would do so, because patch description suggests that it should be backported and has notes about it:

    Backporting notes

Notes for whoever wants to backport this patch to their 4.9 LTS kernel:
* First apply commit 951e796 "btrfs: drop the nossd flag when
  remounting with -o ssd", or fixup the differences manually.
* The rest of the conflicts are because of the fs_info refactoring. So,
  for example, instead of using fs_info, it's root->fs_info in
  extent-tree.c