bcachefs: improve move_gap()

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

fs/bcachefs/btree_journal_iter.c

@@ -218,8 +218,7 @@ int bch2_journal_key_insert_take(struct bch_fs *c, enum btree_id id,
 
 	journal_iters_move_gap(c, keys->gap, idx);
 
-	move_gap(keys->data, keys->nr, keys->size, keys->gap, idx);
-	keys->gap = idx;
+	move_gap(keys, idx);
 
 	keys->nr++;
 	keys->data[keys->gap++] = n;
@@ -473,8 +472,7 @@ void bch2_journal_keys_put(struct bch_fs *c)
 	if (!atomic_dec_and_test(&keys->ref))
 		return;
 
-	move_gap(keys->data, keys->nr, keys->size, keys->gap, keys->nr);
-	keys->gap = keys->nr;
+	move_gap(keys, keys->nr);
 
 	darray_for_each(*keys, i)
 		if (i->allocated)

fs/bcachefs/recovery.c

@@ -531,8 +531,7 @@ static int bch2_set_may_go_rw(struct bch_fs *c)
 	 * setting journal_key->overwritten: it will be accessed by multiple
 	 * threads
 	 */
-	move_gap(keys->data, keys->nr, keys->size, keys->gap, keys->nr);
-	keys->gap = keys->nr;
+	move_gap(keys, keys->nr);
 
 	set_bit(BCH_FS_may_go_rw, &c->flags);
 

fs/bcachefs/util.h

@@ -756,8 +756,12 @@ static inline void __move_gap(void *array, size_t element_size,
 }
 
 /* Move the gap in a gap buffer: */
-#define move_gap(_array, _nr, _size, _old_gap, _new_gap)	\
-	__move_gap(_array, sizeof(_array[0]), _nr, _size, _old_gap, _new_gap)
+#define move_gap(_d, _new_gap)						\
+do {									\
+	__move_gap((_d)->data, sizeof((_d)->data[0]),			\
+		   (_d)->nr, (_d)->size, (_d)->gap, _new_gap);		\
+	(_d)->gap = _new_gap;						\
+} while (0)
 
 #define bubble_sort(_base, _nr, _cmp)					\
 do {									\