btrfs: zoned: move non-changing condition check out of the loop

btrfs_zone_activate() checks if block_group->alloc_offset ==
block_group->zone_capacity every time it iterates the loop. But, it is
not depending on the index. Move out the check and do it only once.

Fixes: f9a912a3c45f ("btrfs: zoned: make zone activation multi stripe capable")
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 1b1b310..b5eb794 100644 (file)
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -1835,6 +1835,12 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group)
                goto out_unlock;
        }
 
+       /* No space left */
+       if (block_group->alloc_offset == block_group->zone_capacity) {
+               ret = false;
+               goto out_unlock;
+       }
+
        for (i = 0; i < map->num_stripes; i++) {
                device = map->stripes[i].dev;
                physical = map->stripes[i].physical;
@@ -1842,12 +1848,6 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group)
                if (device->zone_info->max_active_zones == 0)
                        continue;
 
-               /* No space left */
-               if (block_group->alloc_offset == block_group->zone_capacity) {
-                       ret = false;
-                       goto out_unlock;
-               }
-
                if (!btrfs_dev_set_active_zone(device, physical)) {
                        /* Cannot activate the zone */
                        ret = false;