Deprecate automatic loading of modules

In the hwclock, procfs and sysfs service scripts, we automatically
attempt to load the kernel modules we need before we take any action. We
shouldn't do this, because there are systems which do not use kernel
modules and do not have the kmod package installed.

With this change, we continue to load the modules ourselves, but we warn
the admin that they need to be added to /etc/conf.d/modules or built
into the kernel.

In the future, this automatic loading will be dropped.

X-Gentoo-Bug: 342313
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=342313

init.d/hwclock.in

@@ -30,6 +30,7 @@ fi
 depend()
 {
 	provide clock
+	want modules
 	if yesno $clock_adjfile; then
 		use root
 	else
@@ -81,7 +82,7 @@ get_noadjfile()
 
 start()
 {
-	local retval=0 errstr=""
+	local retval=0 errstr="" modname
 	setupopts
 
 	if [ -z "$utc_cmd" ]; then
@@ -96,7 +97,12 @@ start()
 			[ -e "$rtc" ] && break
 		done
 		if [ ! -e "${rtc}" ]; then
-			modprobe -q rtc-cmos || modprobe -q rtc || modprobe -q genrtc
+		for x in rtc-cmos rtc genrtc; do
+		 modprobe -q $x && modname=$x && break
+		done
+		[ -n "$modname" ] &&
+			ewarn "The $modname module needs to be configured in \
+				@SYSCONFDIR@/conf.d/modules or built in."
 		fi
 	fi
 

init.d/procfs.in

@@ -13,7 +13,8 @@ description="Mounts misc filesystems in /proc."
 
 depend()
 {
-	use modules devfs
+	use devfs
+	want modules
 	need localmount
 	keyword -docker -lxc -openvz -prefix -systemd-nspawn -vserver
 }
@@ -22,7 +23,10 @@ start()
 {
 	# Setup Kernel Support for miscellaneous Binary Formats
 	if [ -d /proc/sys/fs/binfmt_misc -a ! -e /proc/sys/fs/binfmt_misc/register ]; then
-		modprobe -q binfmt-misc
+		if modprobe -q binfmt-misc; then
+			ewarn "The  binfmt-misc module needs to be configured in \
+				@SYSCONFDIR@/conf.d/modules or built in."
+		fi
 		if grep -qs binfmt_misc /proc/filesystems; then
 			ebegin "Mounting misc binary format filesystem"
 			mount -t binfmt_misc -o nodev,noexec,nosuid \

init.d/sysfs.in

@@ -15,6 +15,7 @@ sysfs_opts=nodev,noexec,nosuid
 
 depend()
 {
+	want modules
 	keyword -docker -lxc -prefix -systemd-nspawn -vserver
 }
 
@@ -102,7 +103,10 @@ mount_misc()
 	# it will NOT appear in /proc/filesystems yet
 	if [ -d /sys/firmware/efi/efivars ] \
 		&& ! mountinfo -q /sys/firmware/efi/efivars; then
-		modprobe -q efivarfs
+		if modprobe -q efivarfs; then
+			ewarn "The efivarfs module needs to be configured in \
+				@SYSCONFDIR@/conf.d/modules or built in"
+		fi
 		if grep -qs efivarfs /proc/filesystems; then
 			ebegin "Mounting efivarfs filesystem"
 			mount -n -t efivarfs -o ${sysfs_opts} \