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Subject[tip: x86/cleanups] x86/process: Remove set but not used variables prev and next
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@huawei.com>
AuthorDate: Fri, 13 Dec 2019 20:12:53 +08:00
Committer: Borislav Petkov <bp@suse.de>
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 ‘__switch_to_xtra’:
arch/x86/kernel/process.c:618:31: warning: variable ‘next’ set but not used [-Wunused-but-set-variable]
618 | struct thread_struct *prev, *next;
| ^~~~
arch/x86/kernel/process.c:618:24: warning: variable ‘prev’ 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@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Cc: yi.zhang@huawei.com
Cc: zhengbin13@huawei.com
Link: https://lkml.kernel.org/r/20191213121253.10072-1-yukuai3@huawei.com
---
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);

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