Remove stale initrd images

kernel.spec

@@ -29,7 +29,7 @@
 %define rpmrel		%mkrel 0.%{kpatch}.%{mibrel}
 %endif
 %else
-%define rpmrel		3
+%define rpmrel		4
 %endif
 
 # fakerel and fakever never change, they are used to fool
@@ -1422,6 +1422,17 @@ for ii in \$(/usr/sbin/dkms status -k $KernelVer | awk '{ print \$1 \$2; }'); do
 	ver=\$(echo \$ii | awk -v FS=',' '{ print \$2; }')
 	/usr/sbin/dkms --rpm_safe_upgrade uninstall -m \$mod -v \$ver -k $KernelVer || true
 done
+
+# If any DKMS modules with REMAKE_INITRD=yes in their configs have been
+# uninstalled, initrd has been regenerated for the given kernel. However,
+# the kernel itself might have been uninstalled before, so that (defunct)
+# initrd image files would be left behind. Remove them if the kernel itself
+# is no longer installed. Should work if they are ininstalled in parallel
+# too.
+if ! test -f /boot/vmlinuz-$KernelVer; then
+	rm -f /boot/initrd-$KernelVer.img
+	rm -f /boot/initrd-$KernelVer_old.img
+fi
 EOF
 
 ### Create -devel Postun script on the fly