btrfs: use super write guard in sb_start_write()

Link: https://patch.msgid.link/20251104-work-guards-v1-4-5108ac78a171@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 2bec544d8ba300093ca5915ca5169847e0ba0625..e3788798528dc54b064acb60044431945261e97a 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4660,12 +4660,12 @@ static int balance_kthread(void *data)
        struct btrfs_fs_info *fs_info = data;
        int ret = 0;
 
-       sb_start_write(fs_info->sb);
+       guard(super_write)(fs_info->sb);
+
        mutex_lock(&fs_info->balance_mutex);
        if (fs_info->balance_ctl)
                ret = btrfs_balance(fs_info, fs_info->balance_ctl, NULL);
        mutex_unlock(&fs_info->balance_mutex);
-       sb_end_write(fs_info->sb);
 
        return ret;
 }