linux-kernel - [tip:x86/pti] x86/CPU: Fix unused variable warning when !CONFIG_IA32

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Date:   Sat, 22 Sep 2018 02:15:52 -0700
From:   tip-bot for zhong jiang <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, konrad.wilk@...cle.com, zhongjiang@...wei.com,
        mingo@...nel.org, bp@...e.de, hpa@...or.com, x86@...nel.org,
        dwmw@...zon.co.uk, linux-kernel@...r.kernel.org, luto@...nel.org,
        pasha.tatashin@...cle.com
Subject: [tip:x86/pti] x86/CPU: Fix unused variable warning when
 !CONFIG_IA32_EMULATION

Commit-ID:  8e6b65a1b6cd1711d3acd2aa5c60d38c3e15dabb
Gitweb:     https://git.kernel.org/tip/8e6b65a1b6cd1711d3acd2aa5c60d38c3e15dabb
Author:     zhong jiang <zhongjiang@...wei.com>
AuthorDate: Thu, 13 Sep 2018 10:49:45 +0800
Committer:  Borislav Petkov <bp@...e.de>
CommitDate: Sat, 15 Sep 2018 14:57:05 +0200

x86/CPU: Fix unused variable warning when !CONFIG_IA32_EMULATION

Get rid of local @cpu variable which is unused in the
!CONFIG_IA32_EMULATION case.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Pavel Tatashin <pasha.tatashin@...cle.com>
Cc: x86-ml <x86@...nel.org>
Link: http://lkml.kernel.org/r/1536806985-24197-1-git-send-email-zhongjiang@huawei.com
[ Clean up commit message. ]
Signed-off-by: Borislav Petkov <bp@...e.de>
---
 arch/x86/kernel/cpu/common.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 2d5b1fa5f9c6..8bffeae9bac2 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1531,8 +1531,6 @@ EXPORT_PER_CPU_SYMBOL(__preempt_count);
 /* May not be marked __init: used by software suspend */
 void syscall_init(void)
 {
-	int __maybe_unused cpu = smp_processor_id();
-
 	wrmsr(MSR_STAR, 0, (__USER32_CS << 16) | __KERNEL_CS);
 	wrmsrl(MSR_LSTAR, (unsigned long)entry_SYSCALL_64);
 
@@ -1545,7 +1543,8 @@ void syscall_init(void)
 	 * AMD doesn't allow SYSENTER in long mode (either 32- or 64-bit).
 	 */
 	wrmsrl_safe(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS);
-	wrmsrl_safe(MSR_IA32_SYSENTER_ESP, (unsigned long)(cpu_entry_stack(cpu) + 1));
+	wrmsrl_safe(MSR_IA32_SYSENTER_ESP,
+		    (unsigned long)(cpu_entry_stack(smp_processor_id()) + 1));
 	wrmsrl_safe(MSR_IA32_SYSENTER_EIP, (u64)entry_SYSENTER_compat);
 #else
 	wrmsrl(MSR_CSTAR, (unsigned long)ignore_sysret);