linux-kernel - [PATCH] x86/iperm: remove unused pointers

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Message-Id: <1579596054-254032-1-git-send-email-alex.shi@linux.alibaba.com>
Date:   Tue, 21 Jan 2020 16:40:54 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Andy Lutomirski <luto@...nel.org>,
        Rik van Riel <riel@...riel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Waiman Long <longman@...hat.com>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] x86/iperm: remove unused pointers

No one use the prev/next pointers in its function after commit 22fe5b0439dd
("x86/ioperm: Move TSS bitmap update to exit to user work"). So better to
remove them.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Thomas Gleixner <tglx@...utronix.de> 
Cc: Ingo Molnar <mingo@...hat.com> 
Cc: Borislav Petkov <bp@...en8.de> 
Cc: "H. Peter Anvin" <hpa@...or.com> 
Cc: x86@...nel.org 
Cc: Andy Lutomirski <luto@...nel.org> 
Cc: Rik van Riel <riel@...riel.com> 
Cc: Dave Hansen <dave.hansen@...el.com> 
Cc: Waiman Long <longman@...hat.com> 
Cc: Marcelo Tosatti <mtosatti@...hat.com> 
Cc: linux-kernel@...r.kernel.org 
---
 arch/x86/kernel/process.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 61e93a318983..839b5244e3b7 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -615,12 +615,8 @@ void speculation_ctrl_update_current(void)
 
 void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p)
 {
-	struct thread_struct *prev, *next;
 	unsigned long tifp, tifn;
 
-	prev = &prev_p->thread;
-	next = &next_p->thread;
-
 	tifn = READ_ONCE(task_thread_info(next_p)->flags);
 	tifp = READ_ONCE(task_thread_info(prev_p)->flags);
 
-- 
1.8.3.1