initial buildroot for linux 5.15

package/cgroupfs-mount/Config.in

@@ -0,0 +1,19 @@
+config BR2_PACKAGE_CGROUPFS_MOUNT
+	bool "cgroupfs-mount"
+	depends on !BR2_INIT_SYSTEMD
+	help
+	  cgroupfs mount and umount scripts.
+
+	  requires a Linux kernel >= 3.0 with the following options
+	  enabled:
+
+	  - CONFIG_BLK_CGROUP
+	  - CONFIG_CGROUPS
+	  - CONFIG_CGROUP_CPUACCT
+	  - CONFIG_CGROUP_DEVICE
+	  - CONFIG_CGROUP_FREEZER
+	  - CONFIG_CGROUP_WRITEBACK
+	  - CONFIG_CGROUP_SCHED
+	  - CONFIG_CGROUP_PIDS
+
+	  https://github.com/tianon/cgroupfs-mount

package/cgroupfs-mount/S30cgroupfs

@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+# Set up cgroupfs mounts.
+#
+
+start() {
+	printf "Mounting cgroupfs hierarchy: "
+	/usr/bin/cgroupfs-mount
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+}
+stop() {
+	printf "Unmounting cgroupfs hierarchy: "
+	/usr/bin/cgroupfs-umount
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+}
+restart() {
+	stop
+	start
+}
+
+case "$1" in
+  start)
+      start
+	;;
+  stop)
+      stop
+	;;
+  restart|reload)
+      restart
+	;;
+  *)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+esac

package/cgroupfs-mount/cgroupfs-mount.hash

@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  d6c8aff7af59c7d0082ee3018c97f73b0421e81a49bb28ad9f66a36da5cd6ec7  cgroupfs-mount-1.4.tar.gz
+sha256  e52f47a650734f70c40c8fd9318f85e42777bf3fba7ff1dfb72f845bb417f7e6  debian/copyright

package/cgroupfs-mount/cgroupfs-mount.mk

@@ -0,0 +1,23 @@
+################################################################################
+#
+# cgroupfs-mount
+#
+################################################################################
+
+CGROUPFS_MOUNT_VERSION = 1.4
+CGROUPFS_MOUNT_SITE = $(call github,tianon,cgroupfs-mount,$(CGROUPFS_MOUNT_VERSION))
+CGROUPFS_MOUNT_LICENSE = GPL-3.0+
+CGROUPFS_MOUNT_LICENSE_FILES = debian/copyright
+CGROUPFS_MOUNT_CPE_ID_VENDOR = cgroupfs-mount_project
+
+define CGROUPFS_MOUNT_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/cgroupfs-mount $(TARGET_DIR)/usr/bin/cgroupfs-mount
+	$(INSTALL) -D -m 0755 $(@D)/cgroupfs-umount $(TARGET_DIR)/usr/bin/cgroupfs-umount
+endef
+
+define CGROUPFS_MOUNT_INSTALL_INIT_SYSV
+	$(INSTALL) -m 0755 -D $(CGROUPFS_MOUNT_PKGDIR)/S30cgroupfs \
+		$(TARGET_DIR)/etc/init.d/S30cgroupfs
+endef
+
+$(eval $(generic-package))