[PATCH] powerpc/kvm: Handle the boundary condition correctly

[Aneesh Kumar K.V]

Alexander Graf <agraf at suse.de> writes:

> On 23.08.2013, at 04:31, Aneesh Kumar K.V wrote:
>
>> Alexander Graf <agraf at suse.de> writes:
>> 
>>> On 22.08.2013, at 12:37, Aneesh Kumar K.V wrote:
>>> 
>>>> From: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>
>>> 
>>> Isn't this you?
>> 
>> Yes. The patches are generated using git format-patch and sent by
>> git send-email. That's how it always created patches for me. I am not sure if
>> there is a config I can change to avoid having From:
>> 
>>> 
>>>> 
>>>> We should be able to copy upto count bytes
>>> 
>>> Why?
>>> 
>> 
>> Without this we end up doing
>> 
>> +    struct kvm_get_htab_buf {
>> +        struct kvm_get_htab_header header;
>> +        /*
>> +         * Older kernel required one extra byte.
>> +         */
>> +        unsigned long hpte[3];
>> +    } hpte_buf;
>> 
>> 
>> even though we are only looking for one hpte entry.
>
> Ok, please give me an example with real numbers and why it breaks.
>
>> 
>> http://mid.gmane.org/1376995766-16526-4-git-send-email-aneesh.kumar@linux.vnet.ibm.com
>> 

Didn't quiet get what you are looking for. As explained before, we now
need to pass an array with array size 3 even though we know we need to
read only 2 entries because kernel doesn't loop correctly.

-aneesh