Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "A couple of EFI fixes, plus misc fixes all around the map"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/arm64: Store Runtime Services revision
  firmware: Do not use WARN_ON(!spin_is_locked())
  x86_32, entry: Clean up sysenter_badsys declaration
  x86/doc: Fix the 'tlb_single_page_flush_ceiling' sysconfig path
  x86/mm: Fix sparse 'tlb_single_page_flush_ceiling' warning and make the variable read-mostly
  x86/mm: Fix RCU splat from new TLB tracepoints

arch/x86/kernel/entry_32.S

@@ -683,7 +683,7 @@ END(syscall_badsys)
 sysenter_badsys:
 	movl $-ENOSYS,%eax
 	jmp sysenter_after_call
-END(syscall_badsys)
+END(sysenter_badsys)
 	CFI_ENDPROC
 
 .macro FIXUP_ESPFIX_STACK

arch/x86/mm/tlb.c

@@ -49,7 +49,13 @@ void leave_mm(int cpu)
 	if (cpumask_test_cpu(cpu, mm_cpumask(active_mm))) {
 		cpumask_clear_cpu(cpu, mm_cpumask(active_mm));
 		load_cr3(swapper_pg_dir);
-		trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
+		/*
+		 * This gets called in the idle path where RCU
+		 * functions differently.  Tracing normally
+		 * uses RCU, so we have to call the tracepoint
+		 * specially here.
+		 */
+		trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
 	}
 }
 EXPORT_SYMBOL_GPL(leave_mm);
@@ -174,7 +180,7 @@ void flush_tlb_current_task(void)
  *
  * This is in units of pages.
  */
-unsigned long tlb_single_page_flush_ceiling = 33;
+static unsigned long tlb_single_page_flush_ceiling __read_mostly = 33;
 
 void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
 				unsigned long end, unsigned long vmflag)