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-rw-r--r--fs/xfs/xfs_extent_busy.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/xfs/xfs_extent_busy.c b/fs/xfs/xfs_extent_busy.c
index 9ecfdcdc75..2ccde32c9a 100644
--- a/fs/xfs/xfs_extent_busy.c
+++ b/fs/xfs/xfs_extent_busy.c
@@ -678,3 +678,16 @@ xfs_extent_busy_ag_cmp(
diff = b1->bno - b2->bno;
return diff;
}
+
+/* Are there any busy extents in this AG? */
+bool
+xfs_extent_busy_list_empty(
+ struct xfs_perag *pag)
+{
+ bool res;
+
+ spin_lock(&pag->pagb_lock);
+ res = RB_EMPTY_ROOT(&pag->pagb_tree);
+ spin_unlock(&pag->pagb_lock);
+ return res;
+}