Create sync-repo.yml

.github/workflows/sync-repo.yml

@@ -0,0 +1,20 @@
+name: SYNC REPO
+
+on:
+  push:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: set-remote
+      run: git remote set-url origin git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
+    - name: show-remote
+      run: git remote -v
+    - name: mm-stable
+      run: git checkout mm-stable
+    - name: pull-mm-stable
+      run: git pull