Merge branch 'WIP.x86/entry' into x86/entry, to merge the latest generic code and resolve conflicts

Pick up and resolve the NMI entry code changes from the locking tree,
and also pick up the latest two fixes from tip:core/entry.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 3de0303703ae..48512c7944e7 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -198,6 +198,40 @@ SYSCALL_DEFINE0(ni_syscall)
 	return -ENOSYS;
 }
 
+noinstr bool idtentry_enter_nmi(struct pt_regs *regs)
+{
+	bool irq_state = lockdep_hardirqs_enabled();
+
+	__nmi_enter();
+	lockdep_hardirqs_off(CALLER_ADDR0);
+	lockdep_hardirq_enter();
+	rcu_nmi_enter();
+
+	instrumentation_begin();
+	trace_hardirqs_off_finish();
+	ftrace_nmi_enter();
+	instrumentation_end();
+
+	return irq_state;
+}
+
+noinstr void idtentry_exit_nmi(struct pt_regs *regs, bool restore)
+{
+	instrumentation_begin();
+	ftrace_nmi_exit();
+	if (restore) {
+		trace_hardirqs_on_prepare();
+		lockdep_hardirqs_on_prepare(CALLER_ADDR0);
+	}
+	instrumentation_end();
+
+	rcu_nmi_exit();
+	lockdep_hardirq_exit();
+	if (restore)
+		lockdep_hardirqs_on(CALLER_ADDR0);
+	__nmi_exit();
+}
+
 #ifdef CONFIG_XEN_PV
 #ifndef CONFIG_PREEMPTION
 /*