Author: Baumann <daniel.baumann@progress-linux.org>
Description: Only warn about missing firmware if not in a container.

diff -Naurp initramfs-tools.orig/hook-functions initramfs-tools/hook-functions
--- initramfs-tools.orig/hook-functions
+++ initramfs-tools/hook-functions
@@ -97,6 +97,12 @@ manual_add_modules()
 					continue
 				fi
 
+				# Only warn about missing firmware if
+				# not in a container
+				if ! grep -qs ':cpuset:/$' /proc/1/cgroup; then
+					continue
+				fi
+
 				kmod_modname="${kmod##*/}"
 				kmod_modname="${kmod_modname%%.*}"
 				if grep -q "^$kmod_modname\\>" /proc/modules "${CONFDIR}/modules"; then