linux-kernel - Re: [PATCH 3/4] KVM-S390: Less function calls in kvm_s390_import_bp

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Message-ID: <cff92477-f426-a4c7-fffb-f8bbc378afe7@users.sourceforge.net>
Date:   Mon, 22 Aug 2016 18:56:47 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Cornelia Huck <cornelia.huck@...ibm.com>
Cc:     kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        Christian Bornträger <borntraeger@...ibm.com>,
        David Hildenbrand <dahi@...ux.vnet.ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 3/4] KVM-S390: Less function calls in
 kvm_s390_import_bp_data() after error detection

>> @@ -273,10 +273,12 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
>>  	vcpu->arch.guestdbg.nr_hw_wp = nr_wp;
>>  	vcpu->arch.guestdbg.hw_wp_info = wp_info;
>>  	return 0;
>> -error:
>> -	kfree(bp_data);
>> -	kfree(wp_info);
>> +free_bp_info:
>>  	kfree(bp_info);
>> +free_wp_info:
>> +	kfree(wp_info);
>> +free_bp_data:
>> +	kfree(bp_data);
>>  	return ret;
>>  }
>>
> 
> This replaces a perfectly fine fallthrough

The usage of a single goto label like "error" seems to be convenient.
But how do these habits fit to the current Linux coding style convention?


> with some horrible labels.

Do they explain better which processing steps should be performed
for an efficient exception handling in this function implementation?

Regards,
Markus