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bcachefs: Fix an RCU splat

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Writepoints are never deallocated so the rcu_read_lock() isn't really
needed, but we are doing lockless list traversal.

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 2021-04-15 18:31:58 -04:00 committed by Kent Overstreet
parent 633632ef1b
commit 3e07a7300f
1 changed files with 6 additions and 3 deletions
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9
fs/bcachefs/alloc_foreground.c
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@ -683,11 +683,14 @@ static struct write_point *__writepoint_find(struct hlist_head *head,
{
struct write_point *wp;
rcu_read_lock();
hlist_for_each_entry_rcu(wp, head, node)
if (wp->write_point == write_point)
return wp;
return NULL;
goto out;
wp = NULL;
out:
rcu_read_unlock();
return wp;
}
static inline bool too_many_writepoints(struct bch_fs *c, unsigned factor)