[patch V6 09/37] x86/entry: Split idtentry_enter/exit()

[Thomas Gleixner]

Split the implementation of idtentry_enter/exit() out into inline functions
so that variants of idtentry_enter/exit() can be implemented without
duplicating code.

Signed-off-by: Thomas Gleixner <t...@linutronix.de>

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index a1950aa90223..882ada245bd5 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -539,22 +539,7 @@ void noinstr idtentry_enter(struct pt_regs *regs)
        }
 }
 
-/**
- * idtentry_exit - Common code to handle return from exceptions
- * @regs:      Pointer to pt_regs (exception entry regs)
- *
- * Depending on the return target (kernel/user) this runs the necessary
- * preemption and work checks if possible and required and returns to
- * the caller with interrupts disabled and no further work pending.
- *
- * This is the last action before returning to the low level ASM code which
- * just needs to return to the appropriate context.
- *
- * Invoked by all exception/interrupt IDTENTRY handlers which are not
- * returning through the paranoid exit path (all except NMI, #DF and the IST
- * variants of #MC and #DB) and are therefore on the thread stack.
- */
-void noinstr idtentry_exit(struct pt_regs *regs)
+static __always_inline void __idtentry_exit(struct pt_regs *regs)
 {
        lockdep_assert_irqs_disabled();
 
@@ -609,3 +594,23 @@ void noinstr idtentry_exit(struct pt_regs *regs)
                rcu_irq_exit();
        }
 }
+
+/**
+ * idtentry_exit - Common code to handle return from exceptions
+ * @regs:      Pointer to pt_regs (exception entry regs)
+ *
+ * Depending on the return target (kernel/user) this runs the necessary
+ * preemption and work checks if possible and required and returns to
+ * the caller with interrupts disabled and no further work pending.
+ *
+ * This is the last action before returning to the low level ASM code which
+ * just needs to return to the appropriate context.
+ *
+ * Invoked by all exception/interrupt IDTENTRY handlers which are not
+ * returning through the paranoid exit path (all except NMI, #DF and the IST
+ * variants of #MC and #DB) and are therefore on the thread stack.
+ */
+void noinstr idtentry_exit(struct pt_regs *regs)
+{
+       __idtentry_exit(regs);
+}