ci: sync: add check for next <-> pin-init-next

Signed-off-by: Benno Lossin <benno.lossin@proton.me>

Author: BennoLossin

.github/workflows/sync.yml

@@ -2,7 +2,7 @@ permissions:
   contents: read
 on:
   push:
-    branches: [kernel]
+    branches: [kernel, next]
   schedule:
     - cron: '7 7 * * *'
 name: sync-check
@@ -26,3 +26,26 @@ jobs:
               git status
               false
           fi
+  pin-init-next:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: next
+          path: pin-init
+      - uses: actions/checkout@v4
+        with:
+          repository: "Rust-for-Linux/linux"
+          ref: pin-init-next
+          path: kernel
+      - run:
+          cp -r linux/rust/pin-init .
+          cd pin-init
+          if ! git diff --quiet ; then
+              git diff
+              false
+          fi
+          if [ -n "$(git ls-files --others --exclude-standard)" ]; then
+              git status
+              false
+          fi