diff --git a/_constraints b/_constraints
deleted file mode 100644
index 4057100..0000000
--- a/_constraints
+++ /dev/null
@@ -1,5 +0,0 @@
-<constraints>
-  <linux><version>
-    <min>4.0</min>
-  </version></linux>
-</constraints>
diff --git a/kernel.spec b/kernel.spec
index 2204a1b..de29a17 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -12,7 +12,7 @@
 
 %global KernelVer %{version}-%{release}.%{_target_cpu}
 
-%global hulkrelease vhulk1907.1.0
+%global hulkrelease vhulk1912.2.1
 
 %define with_patch 0
 
@@ -24,7 +24,7 @@
 
 Name:	 kernel
 Version: 4.19.90
-Release: %{hulkrelease}.0019
+Release: %{hulkrelease}.0020
 Summary: Linux Kernel
 License: GPLv2
 URL:	 http://www.kernel.org/
@@ -813,6 +813,9 @@ fi
 %endif
 
 %changelog
+* Sat Dec 28 2019 caomeng<caomeng5g@huawei.com> - 4.19.90-vhulk1912.2.1.0020
+- change tag and change config_ktask
+
 * Sat Dec 28 2019 caomeng<caomeng5g@huawei.com> - 4.19.90-vhulk1907.1.0.0019
 - modefied license