bcachefs: drop bogus percpu_ref_tryget

caller should already be guarding against rw, and checking here breaks
when caller needs to finish updates for going RO

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2018-11-24 18:27:16 -05:00 • committed by Kent Overstreet
commit eb8632657f