wetek_play: build non preemptible kernel.

... and disable rcu boost (this partialy reverts 97e04e7)

disabling preempt fixes dcache related crash
we dont want rcu boost, we dont run realtime apps.

projects/WeTek_Play/linux/linux.arm.conf

@@ -83,8 +83,8 @@ CONFIG_TICK_CPU_ACCOUNTING=y
 #
 # RCU Subsystem
 #
-CONFIG_TREE_PREEMPT_RCU=y
+CONFIG_TREE_RCU=y
-CONFIG_PREEMPT_RCU=y
+# CONFIG_PREEMPT_RCU is not set
 CONFIG_RCU_STALL_COMMON=y
 # CONFIG_RCU_USER_QS is not set
 CONFIG_RCU_FANOUT=32
@@ -92,13 +92,7 @@ CONFIG_RCU_FANOUT_LEAF=16
 # CONFIG_RCU_FANOUT_EXACT is not set
 # CONFIG_RCU_FAST_NO_HZ is not set
 CONFIG_TREE_RCU_TRACE=y
-CONFIG_RCU_BOOST=y
+# CONFIG_RCU_NOCB_CPU is not set
-CONFIG_RCU_BOOST_PRIO=1
-CONFIG_RCU_BOOST_DELAY=500
-CONFIG_RCU_NOCB_CPU=y
-# CONFIG_RCU_NOCB_CPU_NONE is not set
-# CONFIG_RCU_NOCB_CPU_ZERO is not set
-CONFIG_RCU_NOCB_CPU_ALL=y
 CONFIG_IKCONFIG=m
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=17
@@ -245,7 +239,11 @@ CONFIG_IOSCHED_CFQ=y
 # CONFIG_DEFAULT_CFQ is not set
 CONFIG_DEFAULT_NOOP=y
 CONFIG_DEFAULT_IOSCHED="noop"
-CONFIG_UNINLINE_SPIN_UNLOCK=y
+CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
+CONFIG_INLINE_READ_UNLOCK=y
+CONFIG_INLINE_READ_UNLOCK_IRQ=y
+CONFIG_INLINE_WRITE_UNLOCK=y
+CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
 CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
 CONFIG_MUTEX_SPIN_ON_OWNER=y
 CONFIG_FREEZER=y
@@ -433,9 +431,8 @@ CONFIG_HOTPLUG_CPU=y
 CONFIG_LOCAL_TIMERS=y
 CONFIG_ARCH_NR_GPIO=0
 # CONFIG_PREEMPT_NONE is not set
-# CONFIG_PREEMPT_VOLUNTARY is not set
+CONFIG_PREEMPT_VOLUNTARY=y
-CONFIG_PREEMPT=y
+# CONFIG_PREEMPT is not set
-CONFIG_PREEMPT_COUNT=y
 CONFIG_HZ=100
 CONFIG_SCHED_HRTICK=y
 # CONFIG_THUMB2_KERNEL is not set
@@ -3495,7 +3492,6 @@ CONFIG_TIMER_STATS=y
 # CONFIG_SLUB_STATS is not set
 CONFIG_HAVE_DEBUG_KMEMLEAK=y
 # CONFIG_DEBUG_KMEMLEAK is not set
-CONFIG_DEBUG_PREEMPT=y
 # CONFIG_DEBUG_RT_MUTEXES is not set
 # CONFIG_RT_MUTEX_TESTER is not set
 # CONFIG_DEBUG_SPINLOCK is not set
@@ -3525,11 +3521,9 @@ CONFIG_DEBUG_INFO=y
 #
 # RCU Debugging
 #
-# CONFIG_PROVE_RCU_DELAY is not set
 # CONFIG_SPARSE_RCU_POINTER is not set
 # CONFIG_RCU_TORTURE_TEST is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
-CONFIG_RCU_CPU_STALL_VERBOSE=y
 # CONFIG_RCU_CPU_STALL_INFO is not set
 CONFIG_RCU_TRACE=y
 # CONFIG_BACKTRACE_SELF_TEST is not set
@@ -3551,7 +3545,6 @@ CONFIG_TRACING_SUPPORT=y
 CONFIG_FTRACE=y
 # CONFIG_FUNCTION_TRACER is not set
 # CONFIG_IRQSOFF_TRACER is not set
-# CONFIG_PREEMPT_TRACER is not set
 # CONFIG_SCHED_TRACER is not set
 # CONFIG_ENABLE_DEFAULT_TRACERS is not set
 # CONFIG_FTRACE_SYSCALLS is not set