[ALL] RealTime kernel/system changes.

- Raspberry Pi: Using the RT patches and select RT as PREEMPT
- Pipewire changes to upvote itself to prio 95% nice -19
- Other small kernel tweaks and fixes

buildroot-external/kernel/device-drivers.config

@@ -66,7 +66,7 @@ CONFIG_RT2800USB_UNKNOWN=y
 # Multimedia core support
 CONFIG_MEDIA_SUPPORT=y
 CONFIG_MEDIA_CONTROLLER=y
-CONFIG_MEDIA_CONTROLLER_DVB=m
+CONFIG_MEDIA_CONTROLLER_DVB=y
 CONFIG_MEDIA_CAMERA_SUPPORT=y
 CONFIG_MEDIA_ANALOG_TV_SUPPORT=y
 CONFIG_MEDIA_DIGITAL_TV_SUPPORT=y
@@ -186,7 +186,7 @@ CONFIG_SND_HDA=y
 CONFIG_SND_HDA_CORE=y
 CONFIG_SND_HDA_GENERIC=y
 CONFIG_SND_HDA_INTEL=m
-CONFIG_SND_HDA_I915=m
+CONFIG_SND_HDA_I915=y
 CONFIG_SND_HDA_CODEC_REALTEK=m
 CONFIG_SND_HDA_CODEC_ANALOG=m
 CONFIG_SND_HDA_CODEC_VIA=m

buildroot-external/kernel/docker.config

@@ -6,6 +6,7 @@ CONFIG_NET_SCHED=y
 # CONFIG_RT_GROUP_SCHED is not set
 
 CONFIG_CGROUPS=y
+CONFIG_CPUSETS=y
 CONFIG_HUGETLB_PAGE=y
 CONFIG_BLK_CGROUP=y
 CONFIG_BLK_DEV_THROTTLING=y
@@ -16,7 +17,7 @@ CONFIG_CGROUP_HUGETLB=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
 CONFIG_CGROUP_PERF=y
-CONFIG_CGROUP_HUGETLB=y
+
 CONFIG_NET_CLS_CGROUP=y
 CONFIG_CGROUP_NET_PRIO=y
 CONFIG_CGROUP_BPF=y
@@ -73,7 +74,7 @@ CONFIG_IP_NF_TARGET_MASQUERADE=y
 CONFIG_IP_NF_TARGET_REDIRECT=y
 CONFIG_BRIDGE=y
 CONFIG_BRIDGE_NETFILTER=y
-CONFIG_XFRM=y
+CONFIG_XFRM=m
 CONFIG_XFRM_USER=y
 CONFIG_XFRM_ALGO=y
 

buildroot-external/kernel/ovos.config

@@ -1,11 +1,18 @@
 CONFIG_LOCALVERSION="-ovos-buildroot"
 CONFIG_KERNEL_LZO=y
+# CONFIG_KERNEL_GZIP is not set
+
+# GCC plugins are disabled by linux.mk, disable them here to reduce
+# linux-diff-config noise
+
+CONFIG_GCC_PLUGINS=n
 CONFIG_CMDLINE=""
 CONFIG_PANIC_TIMEOUT=5
 CONFIG_PSI=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_MODULE_COMPRESS_NONE=y
+# CONFIG_MODULE_COMPRESS_XZ is not set
 
 CONFIG_ZRAM=y
 CONFIG_KSM=y