From: SF Markus Elfring <elfring@users.sourceforge.net>
To: "Christian Bornträger" <borntraeger@de.ibm.com>
Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
"Cornelia Huck" <cornelia.huck@de.ibm.com>,
"David Hildenbrand" <dahi@linux.vnet.ibm.com>,
"Heiko Carstens" <heiko.carstens@de.ibm.com>,
"Martin Schwidefsky" <schwidefsky@de.ibm.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
kernel-janitors@vger.kernel.org,
"Julia Lawall" <julia.lawall@lip6.fr>
Subject: Re: KVM-S390: Less function calls in kvm_s390_import_bp_data() after error detection
Date: Sat, 27 Aug 2016 18:12:33 +0200 [thread overview]
Message-ID: <05fa56cb-843e-39bd-847d-1b31b5a726b5@users.sourceforge.net> (raw)
In-Reply-To: <f9f50675-b283-4c03-8764-c7c570647fe4@de.ibm.com>
>> @@ -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;
>> }
>
> I agree with Cornelia,
This is generally fine.
> while it seems correct from a technical point of view,
Thanks for another bit of acknowledgement.
> it will make the code harder to maintain.
I agree that there some efforts and challenges involved.
> For example if we ever add a new malloc and remove another one
Do you see any changes coming from this direction?
> over time we would need to reshuffle the labels
This can occasionally happen, can't it?
> and this did went wrong several times in the past.
Would you like to add any corresponding software development experiences
to discussions around a topic like "CodingStyle: add some more error
handling guidelines"?
https://www.spinics.net/lists/linux-doc/msg39307.html
http://marc.info/?l=linux-doc&m=147187538413914
Regards,
Markus
next prev parent reply other threads:[~2016-08-27 16:13 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-17 18:02 [PATCH 0/4] KVM-S390: Fine-tuning for kvm_s390_import_bp_data() SF Markus Elfring
2016-08-17 18:06 ` [PATCH 1/4] KVM-S390: Improve determination of sizes in kvm_s390_import_bp_data() SF Markus Elfring
2016-08-18 7:25 ` walter harms
2016-08-18 9:02 ` Julia Lawall
2016-08-18 9:48 ` Paolo Bonzini
2016-08-18 10:52 ` walter harms
2016-08-18 10:55 ` Paolo Bonzini
2016-08-22 12:58 ` Cornelia Huck
2016-08-24 12:10 ` Replacing specific kmalloc() calls by kmalloc_array()? SF Markus Elfring
2016-08-24 15:00 ` Paolo Bonzini
2016-08-17 18:08 ` [PATCH 2/4] KVM-S390: Use memdup_user() rather than duplicating its implementation SF Markus Elfring
2016-08-22 13:02 ` David Hildenbrand
2016-08-22 13:05 ` Cornelia Huck
2016-08-24 15:19 ` Christian Borntraeger
2016-08-24 18:30 ` [PATCH v2 0/2] KVM: s390: Fine-tuning for kvm_s390_import_bp_data() SF Markus Elfring
2016-08-24 18:36 ` [PATCH v2 1/2] KVM: s390: Improve determination of sizes in kvm_s390_import_bp_data() SF Markus Elfring
2016-08-25 16:10 ` Cornelia Huck
2016-08-25 16:45 ` SF Markus Elfring
2016-08-25 17:34 ` Software evolution around scripts for the semantic patch langugae SF Markus Elfring
2016-08-25 17:40 ` Cornelia Huck
2016-08-25 17:54 ` SF Markus Elfring
2016-08-25 18:14 ` Julia Lawall
2016-08-25 18:20 ` SF Markus Elfring
2016-08-25 18:23 ` Julia Lawall
2016-08-25 21:04 ` Cornelia Huck
2016-08-24 18:40 ` [PATCH v2 2/2] KVM: s390: Use memdup_user() rather than duplicating code SF Markus Elfring
2016-08-25 16:11 ` Cornelia Huck
2016-10-03 12:11 ` Geert Uytterhoeven
2016-10-03 12:28 ` SF Markus Elfring
2016-10-03 13:10 ` Geert Uytterhoeven
2016-10-03 13:47 ` SF Markus Elfring
2016-10-03 14:00 ` Geert Uytterhoeven
2016-10-03 14:25 ` SF Markus Elfring
2016-08-25 16:12 ` [PATCH v2 0/2] KVM: s390: Fine-tuning for kvm_s390_import_bp_data() Christian Borntraeger
2016-08-17 18:10 ` [PATCH 3/4] KVM-S390: Less function calls in kvm_s390_import_bp_data() after error detection SF Markus Elfring
2016-08-22 12:58 ` David Hildenbrand
2016-08-22 13:00 ` Cornelia Huck
2016-08-22 16:56 ` SF Markus Elfring
2016-08-22 19:37 ` Cornelia Huck
2016-08-22 21:17 ` SF Markus Elfring
2016-08-22 21:28 ` Cornelia Huck
2016-08-31 12:29 ` Paolo Bonzini
2016-08-24 15:10 ` Christian Borntraeger
2016-08-27 16:12 ` SF Markus Elfring [this message]
2016-08-17 18:12 ` [PATCH 4/4] KVM-S390: Delete an unnecessary initialisation for a buffer variable SF Markus Elfring
2016-08-22 12:59 ` David Hildenbrand
2016-08-22 13:01 ` Cornelia Huck
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