bcachefs: Add a manual trigger for lock wakeups

Spotted a lockup once that appeared to be a lost wakeup. Adding a manual
trigger for lock wakeups will make it easy to tell if that's what it is
next time it occurs.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2022-09-17 15:20:13 -04:00
commit b8eec67591