Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

Pull core fixes from Thomas Gleixner:

 - Two fixlets for the fallout of the generic idle task conversion

 - Documentation update

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rcu/idle: Wrap cpu-idle poll mode within rcu_idle_enter/exit
  idle: Fix hlt/nohlt command-line handling in new generic idle
  kthread: Document ways of reducing OS jitter due to per-CPU kthreads

diff --combined arch/Kconfig
index dd0e8eb,3e64403..a4429bc
--- 1/arch/Kconfig
--- 2/arch/Kconfig
+++ b/arch/Kconfig
@@@ -213,6 -213,9 +213,9 @@@ config USE_GENERIC_SMP_HELPER
  config GENERIC_SMP_IDLE_THREAD
         bool
  
+ config GENERIC_IDLE_POLL_SETUP
+        bool
+ 
  # Select if arch init_task initializer is different to init/init_task.c
  config ARCH_INIT_TASK
         bool
@@@ -381,12 -384,6 +384,12 @@@ config MODULES_USE_ELF_RE
          Modules only use ELF REL relocations.  Modules with ELF RELA
          relocations will give an error.
  
 +config HAVE_UNDERSCORE_SYMBOL_PREFIX
 +      bool
 +      help
 +        Some architectures generate an _ in front of C symbols; things like
 +        module loading and assembly files need to know about this.
 +
  #
  # ABI hall of shame
  #