include: kernel.mk: simplify module autoloading

Let the generic postinstall script invoke "kmodloader" when the just
installed package contains any /etc/module.d/ entries.

This allows us to skip the explicit "insert_module()" calls in the
package postinstall.

Due to the removed insert_module calls we do not need to assemble a
complete list of modules per package anymore, which allows for vast
simplification of the package generation code.

While we're at it, also support specifying default parameters for
modules using either the MODPARAM or MODPARAM.modulename variables
in KernelPackage.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

include/kernel.mk

@@ -153,58 +153,23 @@ endef
 define KernelPackage/Defaults
   FILES:=
   AUTOLOAD:=
+  MODPARAMS:=
   PKGFLAGS+=nonshared
 endef
 
+# 1: name
+# 2: install prefix
+# 3: module priority prefix
+# 4: required for boot
+# 5: module list
 define ModuleAutoLoad
-	$(SH_FUNC) \
-	export modules=; \
-	probe_module() { \
-		local mods="$$$$$$$$1"; \
-		local boot="$$$$$$$$2"; \
-		local mod; \
-		shift 2; \
-		for mod in $$$$$$$$mods; do \
+  $(if $(5), \
     mkdir -p $(2)/etc/modules.d; \
-			echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
-		done; \
-		if [ -e $(2)/etc/modules.d/$(1) ]; then \
-			if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$(1) ]; then \
+    ($(foreach mod,$(5), \
+      echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
+    $(if $(4), \
       mkdir -p $(2)/etc/modules-boot.d; \
-				ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
-			fi; \
-			modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$mods"; \
-		fi; \
-	}; \
-	add_module() { \
-		local priority="$$$$$$$$1"; \
-		local mods="$$$$$$$$2"; \
-		local boot="$$$$$$$$3"; \
-		local mod; \
-		shift 3; \
-		for mod in $$$$$$$$mods; do \
-			mkdir -p $(2)/etc/modules.d; \
-			echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
-		done; \
-		if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
-			if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$$$$$$$$priority-$(1) ]; then \
-				mkdir -p $(2)/etc/modules-boot.d; \
-				ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
-			fi; \
-			modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
-		fi; \
-	}; \
-	$(3) \
-	if [ -n "$$$$$$$$modules" ]; then \
-		modules="$$$$$$$$(echo "$$$$$$$$modules" | tr ' ' '\n' | sort | uniq | paste -s -d' ' -)"; \
-		mkdir -p $(2)/etc/modules.d; \
-		mkdir -p $(2)/CONTROL; \
-		echo "#!/bin/sh" > $(2)/CONTROL/postinst-pkg; \
-		echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst-pkg; \
-		echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst-pkg; \
-		echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst-pkg; \
-		chmod 0755 $(2)/CONTROL/postinst-pkg; \
-	fi
+      ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
 endef
 
 ifeq ($(DUMP)$(TARGET_BUILD),)
@@ -273,7 +238,7 @@ $(call KernelPackage/$(1)/config)
 				exit 1; \
 			fi; \
 		  done;
-		  $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
+		  $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(wordlist 3,99,$(AUTOLOAD)))
 		  $(call KernelPackage/$(1)/install,$$(1))
       endef
     endif
@@ -295,12 +260,17 @@ endef
 
 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 
+# 1: priority (optional)
+# 2: module list
+# 3: boot flag
 define AutoLoad
-  add_module "$(1)" "$(call version_filter,$(2))" "$(3)";
+  $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 endef
 
+# 1: module list
+# 2: boot flag
 define AutoProbe
-  probe_module "$(call version_filter,$(1))" "$(2)";
+  $(call AutoLoad,,$(1),$(2))
 endef
 
 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)

package/base-files/files/lib/functions.sh

@@ -235,6 +235,10 @@ default_postinst() {
 		rm -fR $root/rootfs-overlay/
 	fi
 
+	if [ -z "$root" ] && grep -q -s "^/etc/modules.d/" "/usr/lib/opkg/info/${pkgname}.list"; then
+		kmodloader
+	fi
+
 	if [ -z "$root" ] && grep -q -s "^/etc/uci-defaults/" "/usr/lib/opkg/info/${pkgname}.list"; then
 		. /lib/functions/system.sh
 		[ -d /tmp/.uci ] || mkdir -p /tmp/.uci