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Date:   Wed, 6 May 2020 16:28:48 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     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'?

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.

> The other stuff I have are extensions, I will send as add-on.
> 
> Thanks!
> 
> 
> -- 
> Thanks,
> 
> David / dhildenb

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