linux-kernel - Re: [PATCH] KVM: arm: get rid of unused arg in cpu_init_hyp

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Date:   Fri, 6 Dec 2019 10:10:53 +0000
From:   Steven Price <steven.price@....com>
To:     linmiaohe <linmiaohe@...wei.com>,
        "maz@...nel.org" <maz@...nel.org>,
        "james.morse@....com" <james.morse@....com>,
        "julien.thierry.kdev@...il.com" <julien.thierry.kdev@...il.com>,
        "suzuki.poulose@....com" <suzuki.poulose@....com>,
        "christoffer.dall@....com" <christoffer.dall@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "eric.auger@...hat.com" <eric.auger@...hat.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "will@...nel.org" <will@...nel.org>,
        "andre.przywara@....com" <andre.przywara@....com>,
        "tglx@...utronix.de" <tglx@...utronix.de>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH] KVM: arm: get rid of unused arg in cpu_init_hyp_mode()

On 30/11/2019 07:20, linmiaohe wrote:
>> From: Miaohe Lin <linmiaohe@...wei.com>
>>
>> As arg dummy is not really needed, there's no need to pass NULL when calling cpu_init_hyp_mode(). So clean it up.

It looks like the requirement for this dummy arg was removed in
67f691976662 ("arm64: kvm: allows kvm cpu hotplug"). FWIW:

Reviewed-by: Steven Price <steven.price@....com>

>> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
>> ---
>> virt/kvm/arm/arm.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 86c6aa1cb58e..a5470f1b1a19 100644
>> --- a/virt/kvm/arm/arm.c
>> +++ b/virt/kvm/arm/arm.c
>> @@ -1315,7 +1315,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
>> 	}
>> }
>>
>> -static void cpu_init_hyp_mode(void *dummy)
>> +static void cpu_init_hyp_mode(void)
>> {
>> 	phys_addr_t pgd_ptr;
>> 	unsigned long hyp_stack_ptr;
>> @@ -1349,7 +1349,7 @@ static void cpu_hyp_reinit(void)
>> 	if (is_kernel_in_hyp_mode())
>> 		kvm_timer_init_vhe();
>> 	else
>> -		cpu_init_hyp_mode(NULL);
>> +		cpu_init_hyp_mode();
>>
>> 	kvm_arm_init_debug();
>>
> friendly ping ...
>