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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@huawei.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: x86-ml <x86@kernel.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@suse.de>
This commit is contained in:
zhong jiang 2018-09-13 10:49:45 +08:00 committed by Borislav Petkov
parent bf904d2762
commit 8e6b65a1b6
1 changed files with 2 additions and 3 deletions
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5
arch/x86/kernel/cpu/common.c
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@ -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);