linux-kernel - [PATCH] csky: remove unsued thread_saved_pc and *

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Date:   Wed, 12 Jun 2019 13:16:11 +0200
From:   Tobias Klauser <tklauser@...tanz.ch>
To:     Guo Ren <guoren@...nel.org>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] csky: remove unsued thread_saved_pc and *_segments functions/macros

These are used nowhere in the tree (except for some architectures which
define them for their own use) and were already removed in:

commit 6474924e2b5d ("arch: remove unused macro/function thread_saved_pc()")
commit c17c02040bf0 ("arch: remove unused *_segments() macros/functions")

Remove them from arch/csky as well.

Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
---
 arch/csky/include/asm/processor.h |  6 ------
 arch/csky/kernel/process.c        | 10 ----------
 2 files changed, 16 deletions(-)

diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h
index 21e0bd5293dd..464575156f0f 100644
--- a/arch/csky/include/asm/processor.h
+++ b/arch/csky/include/asm/processor.h
@@ -83,12 +83,6 @@ static inline void release_thread(struct task_struct *dead_task)
 
 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
 
-#define copy_segments(tsk, mm)		do { } while (0)
-#define release_segments(mm)		do { } while (0)
-#define forget_segments()		do { } while (0)
-
-extern unsigned long thread_saved_pc(struct task_struct *tsk);
-
 unsigned long get_wchan(struct task_struct *p);
 
 #define KSTK_EIP(tsk)		(task_pt_regs(tsk)->pc)
diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c
index e555740c0be5..adeb6b1bdb42 100644
--- a/arch/csky/kernel/process.c
+++ b/arch/csky/kernel/process.c
@@ -24,16 +24,6 @@ asmlinkage void ret_from_kernel_thread(void);
  */
 void flush_thread(void){}
 
-/*
- * Return saved PC from a blocked thread
- */
-unsigned long thread_saved_pc(struct task_struct *tsk)
-{
-	struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp;
-
-	return sw->r15;
-}
-
 int copy_thread(unsigned long clone_flags,
 		unsigned long usp,
 		unsigned long kthread_arg,
-- 
2.20.0