diff --git a/poky/meta/lib/oe/buildcfg.py b/poky/meta/lib/oe/buildcfg.py
new file mode 100644
index 0000000..90f5e05
--- /dev/null
+++ b/poky/meta/lib/oe/buildcfg.py
@@ -0,0 +1,49 @@
+
+import subprocess
+import bb.process
+
+def detect_revision(d):
+    path = get_scmbasepath(d)
+    return get_metadata_git_revision(path, d)
+
+def detect_branch(d):
+    path = get_scmbasepath(d)
+    return get_metadata_git_branch(path, d)
+
+def get_scmbasepath(d):
+    return os.path.join(d.getVar('COREBASE'), 'meta')
+
+def get_metadata_git_branch(path, d):
+    try:
+        rev, _ = bb.process.run('git rev-parse --abbrev-ref HEAD', cwd=path)
+    except bb.process.ExecutionError:
+        rev = '<unknown>'
+    return rev.strip()
+
+def get_metadata_git_revision(path, d):
+    try:
+        rev, _ = bb.process.run('git rev-parse HEAD', cwd=path)
+    except bb.process.ExecutionError:
+        rev = '<unknown>'
+    return rev.strip()
+
+def is_layer_modified(path):
+    try:
+        subprocess.check_output("""cd %s; export PSEUDO_UNLOAD=1; set -e;
+                                git diff --quiet --no-ext-diff
+                                git diff --quiet --no-ext-diff --cached""" % path,
+                                shell=True,
+                                stderr=subprocess.STDOUT)
+        return ""
+    except subprocess.CalledProcessError as ex:
+        # Silently treat errors as "modified", without checking for the
+        # (expected) return code 1 in a modified git repo. For example, we get
+        # output and a 129 return code when a layer isn't a git repo at all.
+        return " -- modified"
+
+def get_layer_revisions(d):
+    layers = (d.getVar("BBLAYERS") or "").split()
+    revisions = []
+    for i in layers:
+        revisions.append((i, os.path.basename(i), get_metadata_git_branch(i, None).strip(), get_metadata_git_revision(i, None), is_layer_modified(i)))
+    return revisions
diff --git a/poky/meta/lib/oe/cve_check.py b/poky/meta/lib/oe/cve_check.py
index dc7d2e2..aa06497 100644
--- a/poky/meta/lib/oe/cve_check.py
+++ b/poky/meta/lib/oe/cve_check.py
@@ -163,3 +163,13 @@
             return
 
     output["package"].append(data["package"][0])
+
+def update_symlinks(target_path, link_path):
+    """
+    Update a symbolic link link_path to point to target_path.
+    Remove the link and recreate it if exist and is different.
+    """
+    if link_path != target_path and os.path.exists(target_path):
+        if os.path.exists(os.path.realpath(link_path)):
+            os.remove(link_path)
+        os.symlink(os.path.basename(target_path), link_path)
diff --git a/poky/meta/lib/oe/patch.py b/poky/meta/lib/oe/patch.py
index 9034fca..95b915a 100644
--- a/poky/meta/lib/oe/patch.py
+++ b/poky/meta/lib/oe/patch.py
@@ -598,6 +598,8 @@
 
     def Clean(self):
         try:
+            # make sure that patches/series file exists before quilt pop to keep quilt-0.67 happy
+            open(os.path.join(self.dir, "patches","series"), 'a').close()
             self._runcmd(["pop", "-a", "-f"])
             oe.path.remove(os.path.join(self.dir, "patches","series"))
         except Exception:
diff --git a/poky/meta/lib/oe/rootfs.py b/poky/meta/lib/oe/rootfs.py
index 98cf3f2..9e6b411 100644
--- a/poky/meta/lib/oe/rootfs.py
+++ b/poky/meta/lib/oe/rootfs.py
@@ -311,7 +311,7 @@
     def _check_for_kernel_modules(self, modules_dir):
         for root, dirs, files in os.walk(modules_dir, topdown=True):
             for name in files:
-                found_ko = name.endswith((".ko", ".ko.gz", ".ko.xz"))
+                found_ko = name.endswith((".ko", ".ko.gz", ".ko.xz", ".ko.zst"))
                 if found_ko:
                     return found_ko
         return False
@@ -328,7 +328,9 @@
         if not os.path.exists(kernel_abi_ver_file):
             bb.fatal("No kernel-abiversion file found (%s), cannot run depmod, aborting" % kernel_abi_ver_file)
 
-        kernel_ver = open(kernel_abi_ver_file).read().strip(' \n')
+        with open(kernel_abi_ver_file) as f:
+            kernel_ver = f.read().strip(' \n')
+
         versioned_modules_dir = os.path.join(self.image_rootfs, modules_dir, kernel_ver)
 
         bb.utils.mkdirhier(versioned_modules_dir)