kernel: clean-up build-configurable kernel config symbols

Don't explicitely disable options in target/linux/generic/config-* if
they are already controlled in config/Config-kernel.in.
Add a bunch of new symbols  and prepare defaults for using only unified
hierarchy (ie. cgroup2). Update symbol dependencies while at it

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

config/Config-kernel.in

@@ -357,6 +357,18 @@ config KERNEL_BLK_DEV_BSG
 	bool "Compile the kernel with SCSI generic v4 support for any block device"
 	default n
 
+config KERNEL_TRANSPARENT_HUGEPAGE
+	bool
+
+config KERNEL_HUGETLBFS
+	bool
+
+config KERNEL_HUGETLB_PAGE
+	bool "Compile the kernel with HugeTLB support"
+	select KERNEL_TRANSPARENT_HUGEPAGE
+	select KERNEL_HUGETLBFS
+	default n
+
 config KERNEL_MAGIC_SYSRQ
 	bool "Compile the kernel with SysRq support"
 	default y
@@ -551,21 +563,29 @@ if KERNEL_CGROUPS
 
 	config KERNEL_FREEZER
 		bool
-		default y if KERNEL_CGROUP_FREEZER
 
 	config KERNEL_CGROUP_FREEZER
-		bool "Freezer cgroup subsystem"
+		bool "legacy Freezer cgroup subsystem"
-		default y
+		default n
+		select KERNEL_FREEZER
 		help
 		  Provides a way to freeze and unfreeze all tasks in a
 		  cgroup.
+		  (legacy cgroup1-only controller, in cgroup2 freezer
+		  is integrated in the Memory controller)
 
 	config KERNEL_CGROUP_DEVICE
-		bool "Device controller for cgroups"
+		bool "legacy Device controller for cgroups"
-		default y
+		default n
 		help
 		  Provides a cgroup implementing whitelists for devices which
 		  a process in the cgroup can mknod or open.
+		  (legacy cgroup1-only controller)
+
+	config KERNEL_CGROUP_HUGETLB
+		bool "HugeTLB controller"
+		default y if KERNEL_HUGETLB_PAGE
+		depends on KERNEL_HUGETLB_PAGE
 
 	config KERNEL_CGROUP_PIDS
 		bool "PIDs cgroup subsystem"
@@ -574,6 +594,14 @@ if KERNEL_CGROUPS
 		  Provides enforcement of process number limits in the scope of a
 		  cgroup.
 
+	config KERNEL_CGROUP_RDMA
+		bool "RDMA controller for cgroups"
+		default y
+
+	config KERNEL_CGROUP_BPF
+		bool "Support for eBPF programs attached to cgroups"
+		default y
+
 	config KERNEL_CPUSETS
 		bool "Cpuset support"
 		default y if !SMALL_FLASH
@@ -609,6 +637,7 @@ if KERNEL_CGROUPS
 	config KERNEL_MEMCG
 		bool "Memory Resource Controller for Control Groups"
 		default y if !SMALL_FLASH
+		select KERNEL_FREEZER
 		depends on KERNEL_RESOURCE_COUNTERS || !LINUX_3_18
 		help
 		  Provides a memory resource controller that manages both anonymous
@@ -631,7 +660,7 @@ if KERNEL_CGROUPS
 
 	config KERNEL_MEMCG_SWAP
 		bool "Memory Resource Controller Swap Extension"
-		default n
+		default y if !SMALL_FLASH
 		depends on KERNEL_MEMCG
 		help
 		  Add swap management feature to memory resource controller. When you
@@ -763,12 +792,12 @@ if KERNEL_CGROUPS
 		  files in a cgroup which can be useful for debugging.
 
 	config KERNEL_NET_CLS_CGROUP
-		bool "Control Group Classifier"
+		bool "legacy Control Group Classifier"
-		default y
+		default n
 
 	config KERNEL_CGROUP_NET_PRIO
-		bool "Network priority cgroup"
+		bool "legacy Network priority cgroup"
-		default y
+		default n
 
 endif
 

target/linux/generic/config-4.14

@@ -725,13 +725,6 @@ CONFIG_CC_STACKPROTECTOR_NONE=y
 # CONFIG_CFG80211 is not set
 # CONFIG_CFG80211_CERTIFICATION_ONUS is not set
 # CONFIG_CFQ_GROUP_IOSCHED is not set
-# CONFIG_CGROUPS is not set
-# CONFIG_CGROUP_BPF is not set
-# CONFIG_CGROUP_DEBUG is not set
-# CONFIG_CGROUP_HUGETLB is not set
-# CONFIG_CGROUP_NET_CLASSID is not set
-# CONFIG_CGROUP_NET_PRIO is not set
-# CONFIG_CGROUP_RDMA is not set
 # CONFIG_CHARGER_BQ2415X is not set
 # CONFIG_CHARGER_BQ24190 is not set
 # CONFIG_CHARGER_BQ24257 is not set
@@ -1756,7 +1749,6 @@ CONFIG_HPET_MMAP_DEFAULT=y
 # CONFIG_HTC_PASIC3 is not set
 # CONFIG_HTS221 is not set
 # CONFIG_HTU21 is not set
-# CONFIG_HUGETLB_PAGE is not set
 # CONFIG_HVC_DCC is not set
 # CONFIG_HVC_UDBG is not set
 # CONFIG_HWLAT_TRACER is not set
@@ -5132,7 +5124,6 @@ CONFIG_TRACE_IRQFLAGS_SUPPORT=y
 # CONFIG_TRACING_EVENTS_GPIO is not set
 CONFIG_TRACING_SUPPORT=y
 CONFIG_TRAD_SIGNALS=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
 # CONFIG_TREE_RCU is not set
 # CONFIG_TREE_RCU_TRACE is not set
 # CONFIG_TRIM_UNUSED_KSYMS is not set

target/linux/generic/config-4.19

@@ -743,12 +743,6 @@ CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
 # CONFIG_CEPH_LIB is not set
 # CONFIG_CFG80211 is not set
 # CONFIG_CFG80211_CERTIFICATION_ONUS is not set
-# CONFIG_CGROUPS is not set
-# CONFIG_CGROUP_BPF is not set
-# CONFIG_CGROUP_DEBUG is not set
-# CONFIG_CGROUP_NET_CLASSID is not set
-# CONFIG_CGROUP_NET_PRIO is not set
-# CONFIG_CGROUP_RDMA is not set
 # CONFIG_CHARGER_ADP5061 is not set
 # CONFIG_CHARGER_BQ2415X is not set
 # CONFIG_CHARGER_BQ24190 is not set
@@ -1867,7 +1861,6 @@ CONFIG_HPET_MMAP_DEFAULT=y
 # CONFIG_HTC_PASIC3 is not set
 # CONFIG_HTS221 is not set
 # CONFIG_HTU21 is not set
-# CONFIG_HUGETLB_PAGE is not set
 # CONFIG_HVC_DCC is not set
 # CONFIG_HVC_UDBG is not set
 # CONFIG_HWLAT_TRACER is not set
@@ -5403,7 +5396,6 @@ CONFIG_TRACE_IRQFLAGS_SUPPORT=y
 # CONFIG_TRACING_EVENTS_GPIO is not set
 CONFIG_TRACING_SUPPORT=y
 CONFIG_TRAD_SIGNALS=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
 # CONFIG_TREE_RCU is not set
 # CONFIG_TREE_RCU_TRACE is not set
 # CONFIG_TRIM_UNUSED_KSYMS is not set

target/linux/generic/config-5.4

@@ -791,13 +791,6 @@ CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
 # CONFIG_CEPH_LIB is not set
 # CONFIG_CFG80211 is not set
 # CONFIG_CFG80211_CERTIFICATION_ONUS is not set
-# CONFIG_CGROUPS is not set
-# CONFIG_CGROUP_BPF is not set
-# CONFIG_CGROUP_DEBUG is not set
-# CONFIG_CGROUP_HUGETLB is not set
-# CONFIG_CGROUP_NET_CLASSID is not set
-# CONFIG_CGROUP_NET_PRIO is not set
-# CONFIG_CGROUP_RDMA is not set
 # CONFIG_CHARGER_ADP5061 is not set
 # CONFIG_CHARGER_BQ2415X is not set
 # CONFIG_CHARGER_BQ24190 is not set
@@ -2005,8 +1998,6 @@ CONFIG_HPET_MMAP_DEFAULT=y
 # CONFIG_HTC_PASIC3 is not set
 # CONFIG_HTS221 is not set
 # CONFIG_HTU21 is not set
-# CONFIG_HUGETLBFS is not set
-# CONFIG_HUGETLB_PAGE is not set
 # CONFIG_HVC_DCC is not set
 # CONFIG_HVC_UDBG is not set
 # CONFIG_HWLAT_TRACER is not set
@@ -5763,7 +5754,6 @@ CONFIG_TRACE_IRQFLAGS_SUPPORT=y
 # CONFIG_TRACING_EVENTS_GPIO is not set
 CONFIG_TRACING_SUPPORT=y
 CONFIG_TRAD_SIGNALS=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
 # CONFIG_TREE_RCU is not set
 # CONFIG_TREE_RCU_TRACE is not set
 # CONFIG_TRIM_UNUSED_KSYMS is not set