[tip: x86/cleanups] x86/process: Remove set but not used variables prev and next

[tip-bot2 for yu kuai]

The following commit has been merged into the x86/cleanups branch of tip:

Commit-ID:     27353d5785bca61bb49cfd7c78e14f1d21e66ec5
Gitweb:        https://git.kernel.org/tip/27353d5785bca61bb49cfd7c78e14f1d21e66ec5
Author:        yu kuai <yukuai3@xxxxxxxxxx>
AuthorDate:    Fri, 13 Dec 2019 20:12:53 +08:00
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Sat, 14 Dec 2019 08:26:00 +01:00

x86/process: Remove set but not used variables prev and next

Remove two unused variables:

  arch/x86/kernel/process.c: In function â__switch_to_xtraâ:
  arch/x86/kernel/process.c:618:31: warning: variable ânextâ set but not used [-Wunused-but-set-variable]
    618 |  struct thread_struct *prev, *next;
        |                               ^~~~
  arch/x86/kernel/process.c:618:24: warning: variable âprevâ set but not used [-Wunused-but-set-variable]
    618 |  struct thread_struct *prev, *next;
        |

They are never used and so can be removed.

Signed-off-by: yu kuai <yukuai3@xxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: x86-ml <x86@xxxxxxxxxx>
Cc: yi.zhang@xxxxxxxxxx
Cc: zhengbin13@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20191213121253.10072-1-yukuai3@xxxxxxxxxx
---
 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 61e93a3..839b524 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);