On Tue, May 05, 2020 at 04:50:13PM +0200, David Hildenbrand wrote:

On 05.05.20 16:15, kbuild test robot wrote:

quoted

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 <redacted>

All error/warnings (new ones prefixed by >>):

   drivers/virtio/virtio_mem.c: In function 'virtio_mem_probe':

quoted

quoted

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

quoted

quoted

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);
                     ^

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quoted

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,

David / dhildenb