add kernel 5.10 support and sync with upstream

.gitignore

@@ -27,3 +27,6 @@ TAGS*~
 git-src
 .git-credentials
 /*.log
+.project
+.cproject
+.ccache

BSDmakefile

@@ -1,7 +1,6 @@
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006 OpenWrt.org
+
 world ${.TARGETS}:
 	@gmake $@

COPYING

@@ -0,0 +1,12 @@
+OpenWrt is provided under:
+
+	SPDX-License-Identifier: GPL-2.0-only
+
+Being under the terms of the GNU General Public License version 2 only,
+according with:
+
+	LICENSES/GPL-2.0
+
+In addition, other licenses may also apply.
+
+All contributions to OpenWrt are subject to this COPYING file.

Config.in

@@ -1,8 +1,6 @@
-# Copyright (C) 2006-2013 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006-2013 OpenWrt.org
 
 mainmenu "OpenWrt Configuration"
 

Makefile

@@ -1,10 +1,6 @@
-# Makefile for OpenWrt
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 TOPDIR:=${CURDIR}
 LC_ALL:=C
@@ -62,6 +58,11 @@ dirclean: clean
 	rm -rf $(TMP_DIR)
 	$(MAKE) -C $(TOPDIR)/scripts/config clean
 
+cacheclean:
+ifneq ($(CONFIG_CCACHE),)
+	$(STAGING_DIR_HOST)/bin/ccache -C
+endif
+
 ifndef DUMP_TARGET_DB
 $(BUILD_DIR)/.prepared: Makefile
 	@mkdir -p $$(dirname $@)
@@ -119,6 +120,9 @@ world: prepare $(target/stamp-compile) $(package/stamp-compile) $(package/stamp-
 	$(_SINGLE)$(SUBMAKE) -r package/index
 	$(_SINGLE)$(SUBMAKE) -r json_overview_image_info
 	$(_SINGLE)$(SUBMAKE) -r checksum
+ifneq ($(CONFIG_CCACHE),)
+	$(STAGING_DIR_HOST)/bin/ccache -s
+endif
 
 .PHONY: clean dirclean prereq prepare world package/symlinks package/symlinks-install package/symlinks-clean
 

config/Config-build.in

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # Copyright (C) 2006-2013 OpenWrt.org
 # Copyright (C) 2016 LEDE Project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 menu "Global build settings"
 
@@ -56,13 +54,12 @@ menu "Global build settings"
 		  If the target supports a newer kernel version than the default,
 		  you can use this config option to enable it
 
-
 	config DISPLAY_SUPPORT
 		bool "Show packages that require graphics support (local or remote)"
 		default n
 
 	config BUILD_PATENTED
-		default n
+		default y
 		bool "Compile with support for patented functionality"
 		help
 		  When this option is disabled, software which provides patented functionality
@@ -89,19 +86,20 @@ menu "Global build settings"
 		  This removes all ipkg/opkg status data files from the target directory
 		  before building the root filesystem.
 
-	config IPK_FILES_CHECKSUMS
-		bool
-		prompt "Record files checksums in package metadata"
-		default n
-		help
-		  This makes file checksums part of package metadata. It increases size
-		  but provides you with pkg_check command to check for flash coruptions.
-
 	config INCLUDE_CONFIG
 		bool "Include build configuration in firmware" if DEVEL
 		default n
 		help
-		  If enabled, buildinfo files will be stored in /etc/build.* of firmware.
+		  If enabled, config.seed will be stored in /etc/build.config of firmware.
+
+	config REPRODUCIBLE_DEBUG_INFO
+		bool "Make debug information reproducible"
+		default BUILDBOT
+		help
+		  This strips the local build path out of debug information. This has the
+		  advantage of making it reproducible, but the disadvantage of making local
+		  debugging using ./scripts/remote-gdb harder, since the debug data will
+		  no longer point to the full path on the build host.
 
 	config COLLECT_KERNEL_DEBUG
 		bool
@@ -173,6 +171,14 @@ menu "Global build settings"
 		help
 		  Specifies arguments passed to the strip command when stripping binaries.
 
+	config SSTRIP_ARGS
+		string
+		prompt "Sstrip arguments"
+		depends on USE_SSTRIP
+		default "-z"
+		help
+		  Specifies arguments passed to the sstrip command when stripping binaries.
+
 	config STRIP_KERNEL_EXPORTS
 		bool "Strip unnecessary exports from the kernel image"
 		help
@@ -198,10 +204,6 @@ menu "Global build settings"
 		config USE_UCLIBCXX
 			bool "uClibc++"
 
-		config USE_LIBCXX
-			bool "libc++"
-			depends on !USE_UCLIBC
-
 		config USE_LIBSTDCXX
 			bool "libstdc++"
 	endchoice
@@ -256,10 +258,8 @@ menu "Global build settings"
 			bool "None"
 		config PKG_CC_STACKPROTECTOR_REGULAR
 			bool "Regular"
-			depends on KERNEL_CC_STACKPROTECTOR_REGULAR
 		config PKG_CC_STACKPROTECTOR_STRONG
 			bool "Strong"
-			depends on KERNEL_CC_STACKPROTECTOR_STRONG
 	endchoice
 
 	choice
@@ -275,11 +275,11 @@ menu "Global build settings"
 			bool "Strong"
 	endchoice
 
-	config  KERNEL_STACKPROTECTOR
+	config KERNEL_STACKPROTECTOR
 		bool
 		default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
 
-	config  KERNEL_STACKPROTECTOR_STRONG
+	config KERNEL_STACKPROTECTOR_STRONG
 		bool
 		default KERNEL_CC_STACKPROTECTOR_STRONG
 
@@ -321,4 +321,46 @@ menu "Global build settings"
 			bool "Full"
 	endchoice
 
+	config TARGET_ROOTFS_SECURITY_LABELS
+		bool
+		select KERNEL_SQUASHFS_XATTR
+		select KERNEL_EXT4_FS_SECURITY
+		select KERNEL_F2FS_FS_SECURITY
+		select KERNEL_UBIFS_FS_SECURITY
+		select KERNEL_JFFS2_FS_SECURITY
+
+	config SELINUX
+		bool "Enable SELinux"
+		select KERNEL_SECURITY_SELINUX
+		select TARGET_ROOTFS_SECURITY_LABELS
+		select PACKAGE_procd-selinux
+		select PACKAGE_busybox-selinux
+		help
+		  This option enables SELinux kernel features, applies security labels
+		  in squashfs rootfs and selects the selinux-variants of busybox and procd.
+
+		  Selecting this option results in about 0.5MiB of additional flash space
+		  usage accounting for increased kernel and rootfs size.
+
+	choice
+		prompt "default SELinux type"
+		depends on TARGET_ROOTFS_SECURITY_LABELS
+		default SELINUXTYPE_dssp
+		help
+		  Select SELinux policy to be installed and used for applying rootfs labels.
+
+		config SELINUXTYPE_targeted
+			bool "targeted"
+			select PACKAGE_refpolicy
+			help
+			  SELinux Reference Policy (refpolicy)
+
+		config SELINUXTYPE_dssp
+			bool "dssp"
+			select PACKAGE_selinux-policy
+			help
+			  Defensec SELinux Security Policy -- OpenWrt edition
+
+	endchoice
+
 endmenu

config/Config-devel.in

@@ -1,8 +1,6 @@
-# Copyright (C) 2006-2013 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006-2013 OpenWrt.org
 
 menuconfig DEVEL
 	bool "Advanced configuration options (for developers)"
@@ -65,10 +63,17 @@ menuconfig DEVEL
 
 	config CCACHE
 		bool "Use ccache" if DEVEL
-		default n
+		default y
 		help
 		  Compiler cache; see https://ccache.samba.org/
 
+	config CCACHE_DIR
+		string "Set ccache directory" if CCACHE
+		default ""
+		help
+		  Store ccache in this directory.
+		  If not set, uses './.ccache'
+
 	config EXTERNAL_KERNEL_TREE
 		string "Use external kernel tree" if DEVEL
 		default ""
@@ -100,18 +105,16 @@ menuconfig DEVEL
 		  It can be a git hash or a branch name.
 		  If unused, the clone's repository HEAD will be checked-out.
 
+	config KERNEL_GIT_MIRROR_HASH
+		string "Enter hash of Git kernel tree source checkout tarball" if DEVEL
+		depends on (KERNEL_GIT_CLONE_URI != "")
+		default ""
+
 	config BUILD_LOG
 		bool "Enable log files during build process" if DEVEL
 		help
 		  If enabled, log files will be written to the ./log directory.
 
-	config BUILD_LOG_DIR
-		string "Log folder" if DEVEL
-		default ""
-		help
-		  Store build logs in this directory.
-		  If not set, uses './logs'
-
 	config SRC_TREE_OVERRIDE
 		bool "Enable package source tree override" if DEVEL
 		help