linux-kernel - Re: [PATCH v1] KVM: SVM: Switch to bitmap

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Message-ID: <26e023cc-a870-23c7-40ed-1c5053e413e0@redhat.com>
Date:   Fri, 14 Sep 2018 19:57:24 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        Radim Krčmář <rkrcmar@...hat.com>,
        kvm@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] KVM: SVM: Switch to bitmap_zalloc()

On 30/08/2018 13:49, Andy Shevchenko wrote:
> Switch to bitmap_zalloc() to show clearly what we are allocating.
> Besides that it returns pointer of bitmap type instead of opaque void *.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  arch/x86/kvm/svm.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index 6276140044d0..5d7e9f76caba 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -1226,8 +1226,7 @@ static __init int sev_hardware_setup(void)
>  	min_sev_asid = cpuid_edx(0x8000001F);
>  
>  	/* Initialize SEV ASID bitmap */
> -	sev_asid_bitmap = kcalloc(BITS_TO_LONGS(max_sev_asid),
> -				sizeof(unsigned long), GFP_KERNEL);
> +	sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
>  	if (!sev_asid_bitmap)
>  		return 1;
>  
> @@ -1405,7 +1404,7 @@ static __exit void svm_hardware_unsetup(void)
>  	int cpu;
>  
>  	if (svm_sev_enabled())
> -		kfree(sev_asid_bitmap);
> +		bitmap_free(sev_asid_bitmap);
>  
>  	for_each_possible_cpu(cpu)
>  		svm_cpu_uninit(cpu);
> 

Queued, thanks.

Paolo