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init: use swclock when no rtc is found

--- a/initramfs-init.in

+++ b/initramfs-init.in

@@ -269,6 +269,14 @@

 	[ "$n" != 0 ] || return 1

 }

+rtc_exists() {

+	local rtc=

+	for rtc in /dev/rtc /dev/rtc[0-9]*; do

+		[ -e "$rtc" ] && break

+	done

+	[ -e "$rtc" ]

+}

+

 # read the kernel options. we need surve things like:

 #  acpi_osi="!Windows 2006" xen-pciback.hide=(01:00.0)

 set -- $(cat /proc/cmdline)

@@ -541,7 +549,6 @@

 	rc_add hwdrivers sysinit

 	rc_add modloop sysinit

-	rc_add hwclock boot

 	rc_add modules boot

 	rc_add sysctl boot

 	rc_add hostname boot

@@ -640,6 +647,13 @@

 if [ -n "$KOPT_ssh_key" ]; then

 	pkgs="$pkgs openssh"

 	rc_add sshd default

+fi

+

+# use swclock if no RTC is found

+if rtc_exists; then

+	rc_add hwclock boot

+else

+	rc_add swclock boot

 fi

 apkflags="--initramfs-diskless-boot --progress"