bcachefs: target_congested -> get_random_u32_below()

get_random_u32_below() has a better algorithm than bch2_rand_range(),
it just didn't exist at the time.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/io_read.c b/fs/bcachefs/io_read.c
index 726da68..aa91fcf 100644 (file)
--- a/fs/bcachefs/io_read.c
+++ b/fs/bcachefs/io_read.c
@@ -59,7 +59,7 @@ static bool bch2_target_congested(struct bch_fs *c, u16 target)
        }
        rcu_read_unlock();
 
-       return bch2_rand_range(nr * CONGESTED_MAX) < total;
+       return get_random_u32_below(nr * CONGESTED_MAX) < total;
 }
 
 #else