Re: linux-next: build warning after merge of the i2c tree

[Jie Deng <jie.deng@xxxxxxxxx>]

On 2021/8/18 15:04, Stephen Rothwell wrote:
> Hi Jie,
>
> On Wed, 18 Aug 2021 14:54:12 +0800 Jie Deng <jie.deng@xxxxxxxxx> wrote:
> > On 2021/8/18 14:29, Stephen Rothwell wrote:
> > > Hi all,
> > >
> > > After merging the i2c tree, today's linux-next build (powerpc
> > > allyesconfig) produced this warning:
> > >
> > > drivers/i2c/busses/i2c-virtio.c: In function 'virtio_i2c_probe':
> > > drivers/i2c/busses/i2c-virtio.c:208:17: warning: unused variable 'pdev' [-Wunused-variable]
> > >     208 |  struct device *pdev = vdev->dev.parent;
> > >         |                 ^~~~
> > >
> > > Introduced by commit
> > >
> > >     8fb12751ac78 ("i2c: virtio: add a virtio i2c frontend driver")
> > Why we have this warning ? In commit 8fb12751ac78, the variable 'pdev' was used in line 237.
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/commit/?h=i2c/for-next&id=8fb12751ac78d0a4ba3c604496ffc8dcd1bd6c31
> When CONFIG_ACPI is not set, ACPI_COMPANION{,_SET} do not use their arguments.


Thanks Stephen. I will send an additional patch to fix it.