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:   Tue, 5 May 2020 16:50:13 +0200
From:   David Hildenbrand <david@...hat.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        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'?

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.

-- 
Thanks,

David / dhildenb