bcachefs: kill ca->freelist_lock

All uses were supposed to be switched over to c->freelist_lock
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/bcachefs.h

@@ -427,7 +427,6 @@ struct bch_dev {
 	 */
 	alloc_fifo		free[RESERVE_NR];
 	alloc_fifo		free_inc;
-	spinlock_t		freelist_lock;
 
 	u8			open_buckets_partial[OPEN_BUCKETS_COUNT];
 	unsigned		open_buckets_partial_nr;

fs/bcachefs/movinggc.c

@@ -107,10 +107,10 @@ static bool have_copygc_reserve(struct bch_dev *ca)
 {
 	bool ret;
 
-	spin_lock(&ca->freelist_lock);
+	spin_lock(&ca->fs->freelist_lock);
 	ret = fifo_full(&ca->free[RESERVE_MOVINGGC]) ||
 		ca->allocator_state != ALLOCATOR_RUNNING;
-	spin_unlock(&ca->freelist_lock);
+	spin_unlock(&ca->fs->freelist_lock);
 
 	return ret;
 }

fs/bcachefs/super.c

@@ -1059,7 +1059,6 @@ static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c,
 
 	writepoint_init(&ca->copygc_write_point, BCH_DATA_USER);
 
-	spin_lock_init(&ca->freelist_lock);
 	bch2_dev_copygc_init(ca);
 
 	INIT_WORK(&ca->io_error_work, bch2_io_error_work);

fs/bcachefs/sysfs.c

@@ -775,7 +775,7 @@ static ssize_t show_reserve_stats(struct bch_dev *ca, char *buf)
 	struct printbuf out = _PBUF(buf, PAGE_SIZE);
 	enum alloc_reserve i;
 
-	spin_lock(&ca->freelist_lock);
+	spin_lock(&ca->fs->freelist_lock);
 
 	pr_buf(&out, "free_inc:\t%zu\t%zu\n",
 	       fifo_used(&ca->free_inc),
@@ -786,7 +786,7 @@ static ssize_t show_reserve_stats(struct bch_dev *ca, char *buf)
 		       fifo_used(&ca->free[i]),
 		       ca->free[i].size);
 
-	spin_unlock(&ca->freelist_lock);
+	spin_unlock(&ca->fs->freelist_lock);
 
 	return out.pos - buf;
 }