bcachefs: Fix an rcu splat

bch2_bucket_alloc() requires rcu_read_lock() to be held.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-11-20 16:12:39 -05:00 • committed by Kent Overstreet
commit f302055077