bcachefs: Kill unnecessary bch2_dev_usage_read()

bch2_dev_usage_read() is fairly expensive, we should optimize this more.

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

diff --git a/fs/bcachefs/alloc_foreground.c b/fs/bcachefs/alloc_foreground.c
index 95aafc232290ac4e0a5863709474f833969996f8..0cac65347a5da896df4b5498395ea9fcfc77daff 100644 (file)
--- a/fs/bcachefs/alloc_foreground.c
+++ b/fs/bcachefs/alloc_foreground.c
@@ -631,7 +631,7 @@ static inline void bch2_dev_stripe_increment_inlined(struct bch_dev *ca,
                               struct bch_dev_usage *usage)
 {
        u64 *v = stripe->next_alloc + ca->dev_idx;
-       u64 free_space = dev_buckets_available(ca, BCH_WATERMARK_normal);
+       u64 free_space = __dev_buckets_available(ca, *usage, BCH_WATERMARK_normal);
        u64 free_space_inv = free_space
                ? div64_u64(1ULL << 48, free_space)
                : 1ULL << 48;