From 6171fc7e4fb14a70edfd86a794a844c3f07823b9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@iki.fi>
Date: Mon, 26 Oct 2015 19:51:08 +0200
Subject: update-kernel: include only needed firmwares in modloop

new modloop (44.9M)
117.9M	4.1.10-0-grsec
39.3M	firmware
157.1M	total

old modloop (80.8M)
117.9M	4.1.10-0-grsec
112.1M	firmware
230.0M	total
---
 update-kernel.in | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/update-kernel.in b/update-kernel.in
index f4d2e8c..1327047 100644
--- a/update-kernel.in
+++ b/update-kernel.in
@@ -140,7 +140,7 @@ trap clean_up EXIT $SIGNALS
 
 
 if [ "$SUPERUSER" ]; then
-    apk add $QUIET_OPT --update-cache -t $VIRTUAL mkinitfs squashfs-tools
+    apk add $QUIET_OPT --update-cache -t $VIRTUAL mkinitfs squashfs-tools kmod
 fi
 
 if [ -z "$features" ]; then
@@ -221,7 +221,10 @@ DTB_STAGING=$TMPDIR/dtbs
 
 mkdir $DTB_STAGING $MODLOOP $STAGING
 cp -a $ROOT/lib/modules $MODLOOP
-cp -a $ROOT/lib/firmware $MODLOOP/modules
+mkdir -p $MODLOOP/modules/firmware
+find $ROOT/lib/modules -type f -name "*.ko" | xargs modinfo -F firmware | sort -u | while read FW; do
+	[ -e "$ROOT/lib/firmware/$FW" ] && install -pD $ROOT/lib/firmware/$FW $MODLOOP/modules/firmware/$FW
+done
 _exec mksquashfs $MODLOOP "$STAGING/$MODIMG" -comp xz
 
 _exec mkinitfs -q -b $ROOT -F "$features base squashfs" \
-- 
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