netdev - Re: [vhost:vhost 8/22] drivers/virtio/virtio_mem.c:1375:20: error: implicit declaration of function 'kzalloc'; did you mean 'vzalloc'?

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Date:   Wed, 6 May 2020 22:32:31 +0200
From:   David Hildenbrand <david@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     David Hildenbrand <david@...hat.com>,
        kbuild test robot <lkp@...el.com>, kbuild-all@...ts.01.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, Pankaj Gupta <pankaj.gupta.linux@...il.com>
Subject: Re: [vhost:vhost 8/22] drivers/virtio/virtio_mem.c:1375:20: error: implicit declaration of function 'kzalloc'; did you mean 'vzalloc'?



> Am 06.05.2020 um 22:28 schrieb Michael S. Tsirkin <mst@...hat.com>:
> 
> On Tue, May 05, 2020 at 06:22:51PM +0200, David Hildenbrand wrote:
>>> On 05.05.20 18:20, Michael S. Tsirkin wrote:
>>> On Tue, May 05, 2020 at 05:46:44PM +0200, David Hildenbrand wrote:
>>>> On 05.05.20 17:44, Michael S. Tsirkin wrote:
>>>>> On Tue, May 05, 2020 at 04:50:13PM +0200, David Hildenbrand wrote:
>>>>>> On 05.05.20 16:15, kbuild test robot wrote:
>>>>>>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
>>>>>>> head:   da1742791d8c0c0a8e5471f181549c4726a5c5f9
>>>>>>> commit: 7527631e900d464ed2d533f799cb0da2b29cc6f0 [8/22] virtio-mem: Paravirtualized memory hotplug
>>>>>>> config: x86_64-randconfig-b002-20200505 (attached as .config)
>>>>>>> compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
>>>>>>> reproduce:
>>>>>>>        git checkout 7527631e900d464ed2d533f799cb0da2b29cc6f0
>>>>>>>        # save the attached .config to linux build tree
>>>>>>>        make ARCH=x86_64 
>>>>>>> 
>>>>>>> If you fix the issue, kindly add following tag as appropriate
>>>>>>> Reported-by: kbuild test robot <lkp@...el.com>
>>>>>>> 
>>>>>>> All error/warnings (new ones prefixed by >>):
>>>>>>> 
>>>>>>>   drivers/virtio/virtio_mem.c: In function 'virtio_mem_probe':
>>>>>>>>> drivers/virtio/virtio_mem.c:1375:20: error: implicit declaration of function 'kzalloc'; did you mean 'vzalloc'? [-Werror=implicit-function-declaration]
>>>>>>>     vdev->priv = vm = kzalloc(sizeof(*vm), GFP_KERNEL);
>>>>>>>                       ^~~~~~~
>>>>>>>                       vzalloc
>>>>>>>>> drivers/virtio/virtio_mem.c:1375:18: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
>>>>>>>     vdev->priv = vm = kzalloc(sizeof(*vm), GFP_KERNEL);
>>>>>>>                     ^
>>>>>>>>> drivers/virtio/virtio_mem.c:1419:2: error: implicit declaration of function 'kfree'; did you mean 'vfree'? [-Werror=implicit-function-declaration]
>>>>>>>     kfree(vm);
>>>>>>>     ^~~~~
>>>>>>>     vfree
>>>>>>>   cc1: some warnings being treated as errors
>>>>>>> 
>>>>>>> vim +1375 drivers/virtio/virtio_mem.c
>>>>>> 
>>>>>> Guess we simply need
>>>>>> 
>>>>>> #include <linux/slab.h>
>>>>>> 
>>>>>> to make it work for that config.
>>>>> 
>>>>> 
>>>>> OK I added that in the 1st commit that introduced virtio-mem.
>>>> 
>>>> Thanks. I have some addon-patches ready, what's the best way to continue
>>>> with these?
>>> 
>>> If these are bugfixes, just respin the series (including this fix).
>> 
>> There are two really minor bugfixes for corner-case error handling and
>> one simplification. I can squash them and resend, makes things easier.
> 
> OK try to do it ASAP, we don't want to repeat the drama we had with vdpa.
> 

Yeah, did some more testing today. Will send v3 out tomorrow.

Cheers!