[PATCH V3 3/3] x86/entry: remove unused sync_regs()

[Lai Jiangshan]

From: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx>

No more users.

Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx>
---
 arch/x86/include/asm/traps.h |  1 -
 arch/x86/kernel/traps.c      | 13 -------------
 2 files changed, 14 deletions(-)

diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 714b1a30e7b0..52cd29bde1d0 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -10,7 +10,6 @@
 #include <asm/siginfo.h>			/* TRAP_TRACE, ... */
 
 #ifdef CONFIG_X86_64
-asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs);
 asmlinkage __visible notrace
 struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s);
 void __init trap_init(void);
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 852de6f1bf88..ebea1c3e473b 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -660,19 +660,6 @@ DEFINE_IDTENTRY_RAW(exc_int3)
 }
 
 #ifdef CONFIG_X86_64
-/*
- * Help handler running on a per-cpu (IST or entry trampoline) stack
- * to switch to the normal thread stack if the interrupted code was in
- * user mode. The actual stack switch is done in entry_64.S
- */
-asmlinkage __visible noinstr struct pt_regs *sync_regs(struct pt_regs *eregs)
-{
-	struct pt_regs *regs = (struct pt_regs *)this_cpu_read(cpu_current_top_of_stack) - 1;
-	if (regs != eregs)
-		*regs = *eregs;
-	return regs;
-}
-
 struct bad_iret_stack {
 	void *error_entry_ret;
 	struct pt_regs regs;
-- 
2.19.1.6.gb485710b