Re: [PATCH] staging: comedi: cast to (void __user *)

From: Atul Gopinathan
Date: Thu Feb 18 2021 - 05:06:05 EST


On Thu, Feb 18, 2021 at 08:10:28AM +0100, Greg KH wrote:
> On Thu, Feb 18, 2021 at 11:58:40AM +0530, Atul Gopinathan wrote:
> > Resolve the following sparse warning:
> > drivers/staging//comedi/comedi_fops.c:2983:41: warning: incorrect type in argument 1 (different address spaces)
> > drivers/staging//comedi/comedi_fops.c:2983:41: expected void [noderef] <asn:1> *uptr
> > drivers/staging//comedi/comedi_fops.c:2983:41: got unsigned int *chanlist
> >
> > cmd->chanlist is of type (unsigned int *) as defined in
> > "struct comedi_cmd" in file drivers/staging/comedi/comedi.h
> >
> > The function "ptr_to_compat()" expects argument of type
> > (void __user *) as defined in include/linux/compat.h
> >
> > Signed-off-by: Atul Gopinathan <atulgopinathan@xxxxxxxxx>
> > ---
> > drivers/staging/comedi/comedi_fops.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Is this different from your previous patch:
> https://lore.kernel.org/r/20210217165907.9777-1-atulgopinathan@xxxxxxxxx
>
> if so, you might need a better subject line here, and for that one, as
> they look alike at a quick glance.
>
> Which one goes first?
>
> Can you resend both of these as a patch series with better subjects as a
> v2 patch set?

Sure! That subject line was a terrible result of me trying really hard
to make it concise and fit within git's recommended 50 character limit
for commit headings. I will make sure to prioritize on quality more. :D

Thanks for the feedback!
Atul