Merge pull request #1239 from c-po/compress-kernel-modules

Kernel: T5641: enable module compression to save disk space

1 files changed, 15 insertions, 2 deletions

diff --git a/scripts/package-build/linux-kernel/sign-modules.sh b/scripts/package-build/linux-kernel/sign-modules.sh
index cfb368eb..1fb82165 100755
--- a/scripts/package-build/linux-kernel/sign-modules.sh
+++ b/scripts/package-build/linux-kernel/sign-modules.sh
@@ -1,15 +1,28 @@
-#!/bin/sh
+#!/bin/sh -x
 
 BASE_DIR=$(dirname $0)
 MODULE_DIR=$1
+# Pass "--keep" as $2 to retain the uncompressed, signed .ko next to the
+# .ko.xz it produces. Needed by callers whose build system tracks the
+# uncompressed .ko as a build output (e.g. CMake custom commands) and
+# would otherwise consider it missing and regenerate an unsigned copy.
+KEEP_UNCOMPRESSED=$2
 . ${BASE_DIR}/kernel-vars
 
 SIGN_FILE="${KERNEL_DIR}/scripts/sign-file"
+CONFIG_FILE="${KERNEL_DIR}/.config"
 
 if [ -f ${EPHEMERAL_KEY} ] && [ -f ${EPHEMERAL_CERT} ]; then
     find ${MODULE_DIR} -type f -name \*.ko | while read MODULE; do
       echo "I: Signing ${MODULE} ..."
       ${SIGN_FILE} sha512 ${EPHEMERAL_KEY} ${EPHEMERAL_CERT} ${MODULE}
+      if [ -f "$CONFIG_FILE" ] && grep -qx "CONFIG_MODULE_COMPRESS_XZ=y" "$CONFIG_FILE"; then
+          if [ "${KEEP_UNCOMPRESSED}" = "--keep" ]; then
+              xz --compress --keep ${MODULE}
+          else
+              xz --compress ${MODULE}
+          fi
+      fi
     done
+    find ${MODULE_DIR}
 fi
-