Re: [PATCH v3 4/7] staging: vt6655: Replace VNSvOutPortB with iowrite8

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Tue, Apr 12, 2022 at 08:45:53AM +0200, Philipp Hortmann wrote:
> On 4/12/22 08:37, Dan Carpenter wrote:
> > On Mon, Apr 11, 2022 at 10:49:39PM +0200, Philipp Hortmann wrote:
> > > Replace macro VNSvOutPortB with iowrite8.
> > > The name of macro and the arguments use CamelCase which
> > > is not accepted by checkpatch.pl
> > > 
> > > For constants from 0 to below 0x80 the u8 cast was omitted.
> > > For variables which are defined as unsigned char the u8 is omitted.
> > I hate that GCC prints warnings for this.  Useless.  Horrible.  But I
> > understand that GCC does and we haven't figured out how to disable it
> > or who needs to approve that.
> > 
> > But even then I still don't understand the casting in this patch.
> > 
> > Shouldn't the rule be to do the minimum work arounds to silence GCC?
> > My understand is that the the casting is only needed when you're dealing
> > with a bitwise negated constant.  These are macros so the parameters
> > might be constant so basically any bitwise negate gets a cast.
> > 
> 
> Please send me the compiler flags you are using.
> I was using:
> make "KCFLAGS=-pipe -Wall" -C . M=drivers/staging/vt6655/

Why are you adding random flags to the build?  Just stick with the
default ones, that's all you need.

thanks,

greg k-h