entry: Rename enter_from_user_mode()

In order to make this function publicly available rename it so it can still
be inlined. An additional enter_from_user_mode() function will be added with
a later commit.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201201142755.31931-2-svens@linux.ibm.com

kernel/entry/common.c

@@ -11,7 +11,7 @@
 #include <trace/events/syscalls.h>
 
 /**
- * enter_from_user_mode - Establish state when coming from user mode
+ * __enter_from_user_mode - Establish state when coming from user mode
  *
  * Syscall/interrupt entry disables interrupts, but user mode is traced as
  * interrupts enabled. Also with NO_HZ_FULL RCU might be idle.
@@ -20,7 +20,7 @@
  * 2) Invoke context tracking if enabled to reactivate RCU
  * 3) Trace interrupts off state
  */
-static __always_inline void enter_from_user_mode(struct pt_regs *regs)
+static __always_inline void __enter_from_user_mode(struct pt_regs *regs)
 {
 	arch_check_user_regs(regs);
 	lockdep_hardirqs_off(CALLER_ADDR0);
@@ -103,7 +103,7 @@ noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall)
 {
 	long ret;
 
-	enter_from_user_mode(regs);
+	__enter_from_user_mode(regs);
 
 	instrumentation_begin();
 	local_irq_enable();
@@ -115,7 +115,7 @@ noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall)
 
 noinstr void syscall_enter_from_user_mode_prepare(struct pt_regs *regs)
 {
-	enter_from_user_mode(regs);
+	__enter_from_user_mode(regs);
 	instrumentation_begin();
 	local_irq_enable();
 	instrumentation_end();
@@ -304,7 +304,7 @@ __visible noinstr void syscall_exit_to_user_mode(struct pt_regs *regs)
 
 noinstr void irqentry_enter_from_user_mode(struct pt_regs *regs)
 {
-	enter_from_user_mode(regs);
+	__enter_from_user_mode(regs);
 }
 
 noinstr void irqentry_exit_to_user_mode(struct pt_regs *regs)