Btrfs: hold the ordered operations mutex when waiting on ordered extents

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / btrfs / ordered-data.c

diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index dc08d77..005c45d 100644 (file)
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -557,6 +557,7 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
        INIT_LIST_HEAD(&splice);
        INIT_LIST_HEAD(&works);
 
+       mutex_lock(&root->fs_info->ordered_operations_mutex);
        spin_lock(&root->fs_info->ordered_extent_lock);
        list_splice_init(&root->fs_info->ordered_extents, &splice);
        while (!list_empty(&splice)) {
@@ -600,6 +601,7 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
 
                cond_resched();
        }
+       mutex_unlock(&root->fs_info->ordered_operations_mutex);
 }
 
 /*