Re: [PATCH 1/1] iio: industrialio-trigger: Use 'gnu_printf' format notation

[Lee Jones <lee.jones@linaro.org>]

On Mon, 02 Nov 2020, Lars-Peter Clausen wrote:

> On 11/2/20 12:17 PM, Lee Jones wrote:
> > Fixes the following W=1 kernel build warning(s):
> > 
> >   drivers/iio/industrialio-trigger.c: In function ‘iio_alloc_pollfunc’:
> >   drivers/iio/industrialio-trigger.c:338:2: warning: function ‘iio_alloc_pollfunc’ might be a candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]
> 
> Jonathan already sent a similar patch. See
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cd7798cbd28044a3026619e36993160ba8fa118d
> <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cd7798cbd28044a3026619e36993160ba8fa118d>

So adding this to the prototype also squashes the warning?

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >   drivers/iio/industrialio-trigger.c | 1 +
> >   1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
> > index 583bb51f65a75..1d65c83439d84 100644
> > --- a/drivers/iio/industrialio-trigger.c
> > +++ b/drivers/iio/industrialio-trigger.c
> > @@ -320,6 +320,7 @@ irqreturn_t iio_pollfunc_store_time(int irq, void *p)
> >   }
> >   EXPORT_SYMBOL(iio_pollfunc_store_time);
> > +__printf(5, 6)
> >   struct iio_poll_func
> >   *iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
> >   		    irqreturn_t (*thread)(int irq, void *p),
> 
> 

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
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