[PATCH 01/18] bcachefs: bch2_lru_change() checks for no-op

[Kent Overstreet <kent.overstreet@linux.dev>]

Minor cleanup, no reason for the caller to have to this.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 fs/bcachefs/alloc_background.c | 32 +++++++++++++-------------------
 fs/bcachefs/lru.c              |  6 +++---
 fs/bcachefs/lru.h              | 11 ++++++++++-
 3 files changed, 26 insertions(+), 23 deletions(-)

diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c
index a35455802280..e1061524bdf5 100644
--- a/fs/bcachefs/alloc_background.c
+++ b/fs/bcachefs/alloc_background.c
@@ -889,26 +889,20 @@ int bch2_trigger_alloc(struct btree_trans *trans,
 		    !new_a->io_time[READ])
 			new_a->io_time[READ] = bch2_current_io_time(c, READ);
 
-		u64 old_lru = alloc_lru_idx_read(*old_a);
-		u64 new_lru = alloc_lru_idx_read(*new_a);
-		if (old_lru != new_lru) {
-			ret = bch2_lru_change(trans, new.k->p.inode,
-					      bucket_to_u64(new.k->p),
-					      old_lru, new_lru);
-			if (ret)
-				goto err;
-		}
+		ret = bch2_lru_change(trans, new.k->p.inode,
+				      bucket_to_u64(new.k->p),
+				      alloc_lru_idx_read(*old_a),
+				      alloc_lru_idx_read(*new_a));
+		if (ret)
+			goto err;
 
-		old_lru = alloc_lru_idx_fragmentation(*old_a, ca);
-		new_lru = alloc_lru_idx_fragmentation(*new_a, ca);
-		if (old_lru != new_lru) {
-			ret = bch2_lru_change(trans,
-					BCH_LRU_FRAGMENTATION_START,
-					bucket_to_u64(new.k->p),
-					old_lru, new_lru);
-			if (ret)
-				goto err;
-		}
+		ret = bch2_lru_change(trans,
+				      BCH_LRU_FRAGMENTATION_START,
+				      bucket_to_u64(new.k->p),
+				      alloc_lru_idx_fragmentation(*old_a, ca),
+				      alloc_lru_idx_fragmentation(*new_a, ca));
+		if (ret)
+			goto err;
 
 		if (old_a->gen != new_a->gen) {
 			ret = bch2_bucket_gen_update(trans, new.k->p, new_a->gen);
diff --git a/fs/bcachefs/lru.c b/fs/bcachefs/lru.c
index ce794d55818f..8ec16ae8daa6 100644
--- a/fs/bcachefs/lru.c
+++ b/fs/bcachefs/lru.c
@@ -59,9 +59,9 @@ int bch2_lru_set(struct btree_trans *trans, u16 lru_id, u64 dev_bucket, u64 time
 	return __bch2_lru_set(trans, lru_id, dev_bucket, time, KEY_TYPE_set);
 }
 
-int bch2_lru_change(struct btree_trans *trans,
-		    u16 lru_id, u64 dev_bucket,
-		    u64 old_time, u64 new_time)
+int __bch2_lru_change(struct btree_trans *trans,
+		      u16 lru_id, u64 dev_bucket,
+		      u64 old_time, u64 new_time)
 {
 	if (old_time == new_time)
 		return 0;
diff --git a/fs/bcachefs/lru.h b/fs/bcachefs/lru.h
index f31a6cf1514c..2facc0758cb3 100644
--- a/fs/bcachefs/lru.h
+++ b/fs/bcachefs/lru.h
@@ -46,7 +46,16 @@ void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
 
 int bch2_lru_del(struct btree_trans *, u16, u64, u64);
 int bch2_lru_set(struct btree_trans *, u16, u64, u64);
-int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
+int __bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
+
+static inline int bch2_lru_change(struct btree_trans *trans,
+		      u16 lru_id, u64 dev_bucket,
+		      u64 old_time, u64 new_time)
+{
+	return old_time != new_time
+		? __bch2_lru_change(trans, lru_id, dev_bucket, old_time, new_time)
+		: 0;
+}
 
 struct bkey_buf;
 int bch2_lru_check_set(struct btree_trans *, u16, u64, struct bkey_s_c, struct bkey_buf *);
-- 
2.45.2