bucket_table_alloc
tbl = bucket_table_alloc(ht, size, GFP_KERNEL);
tbl = bucket_table_alloc(ht, size, GFP_KERNEL | __GFP_NOFAIL);
new_tbl = bucket_table_alloc(ht, size, GFP_KERNEL);
new_tbl = bucket_table_alloc(ht, size, GFP_ATOMIC | __GFP_NOWARN);